Leanpub Header

Skip to main content

The Wizard's Lens: Learn to Think Like AI (The Course)

HPC Tradecraft Apprenticeship, Volume 3

The instructor has published 100% of this course.Last updated on 2026-08-23

Learn to think like AI through a working LLM you build yourself. Battle-tested systems thinking from Cray Research applied to modern AI. Accomplish what others consider impossible.

Minimum price

$359.95

$439.95

You pay

Author earns

$

Also available for 2 course credits with a Learner Membership

PDF
EPUB
WEB
About

About

About the Course

What if you could see how AI actually thinks?

Not metaphorically. Not theoretically. But through a working demonstration you can build yourself using physical objects—the same approach Donald Michie used in 1961 to prove machines could learn, by teaching matchboxes to win at tic-tac-toe.

The Wizard’s Lens reveals something that does not exist elsewhere in AI literature: a complete Large Language Model you can construct and operate with terrain maps, tokens, and attention mechanisms made tangible. This is not a metaphor for understanding AI. This is AI, demonstrated through physical implementation.

While others struggle to use AI effectively, this book teaches you to think like AI—to see the patterns, understand the mechanisms, and apply insights that enable you to accomplish what has never been done before.

The Hidden Knowledge

What Cray Research accomplished is well documented: we built the world’s fastest supercomputers and changed what was computationally possible. How we did it has never been written down—until now.

This book shares the systems thinking approaches and revolutionary mindset from that era, applied to modern AI. Not as history, but as practical methods you can use today. The same approaches that created computational breakthroughs in environments where second place was not survivable now reveal how to work with AI in ways others cannot replicate.

For those who recognize the significance of Cray Research: yes, this is that knowledge. For everyone else: you’re learning approaches that have already proven they enable the impossible.

What You’ll Discover

Through hands-on demonstrations and clear explanations, you’ll learn:

Token Context and Embeddings - Build a working model that shows how AI represents and processes information, using physical tokens and terrain maps that make abstract concepts concrete.

Attention Mechanisms - Understand how AI focuses on relevant information through a demonstration you can manipulate yourself, revealing why certain approaches work and others fail.

The Ping Pong Effect - Move beyond one-shot prompting to develop collaborative relationships with AI that grow more effective with each interaction.

Pattern Recognition at Scale - Learn to see how AI connects disparate information, and how to structure your work to leverage these connections.

Revolutionary Thinking - Develop the mindset that enables you to take on challenges others consider impossible, treating “it can’t be done” as an invitation rather than a boundary.

Why This Book is Different

Most AI books teach you to write better prompts or explain transformer architecture with equations. This book shows you how the mechanisms actually work through physical demonstration, then teaches you to apply that understanding in ways no one else can.

You’ll learn to use AI like nobody before you—not through tricks or techniques, but through genuine understanding of how Large Language Models process information, maintain context, and generate responses. This understanding transforms how you collaborate with AI, opening possibilities that others believe require technology that doesn’t exist yet.

Who This Book is For

This book serves multiple audiences:

Professionals and knowledge workers who need to accomplish complex tasks with AI and recognize that basic prompting has fundamental limitations.

Developers and technical practitioners who want to understand LLM internals without drowning in mathematics, gaining practical insight that informs better implementation decisions.

Strategic thinkers and innovators who need to solve problems that have never been solved before, and recognize that revolutionary results require revolutionary approaches.

Anyone who suspects there’s more to AI than what current tutorials and guides reveal, and wants to develop capabilities that create genuine competitive advantage.

The Author’s Background

Edward W. Barnard spent years at Cray Research during the era when we were accomplishing what had never been done before in computing. This book shares the systems thinking approaches and revolutionary mindset from that time, now applied to AI collaboration.

These aren’t theoretical frameworks. These are battle-tested methods from environments where results mattered more than credentials, where impossible challenges were solved through clear thinking and revolutionary approaches to complex systems.

The cryptographic origins of modern computing—from Alan Turing through Seymour Cray—created specific ways of thinking about information, context, and computational possibility. This book teaches those approaches in a form you can apply immediately.

What’s In It For You

Immediate capability - Learn to accomplish tasks with AI that others consider beyond current technology, through understanding how LLMs actually process and generate information.

Deep understanding - Build a working LLM yourself, making abstract concepts concrete and revealing why certain approaches succeed while others fail.

Transferable skills - Develop systems thinking approaches that work across all AI platforms and remain valuable regardless of how technology evolves.

Revolutionary mindset - Learn to approach impossible challenges the way they were approached at Cray Research: as interesting problems to solve rather than boundaries to accept.

Long-term mastery - Create a foundation for continually improving your AI collaboration skills, based on understanding rather than memorized techniques.

Whether you’re drowning in operational complexity, struggling with projects that seem beyond AI’s current capabilities, or simply know there’s a better way to work with these tools, this book will transform not just what you can accomplish with AI, but how you think about what’s possible.

The revolution isn’t coming. It’s here. The question is whether you’ll be among those who can see it.

Instructor

About the Instructor

Edward W. Barnard

No Time to Be Beginners

What was it like to stand in the breach, with nobody else to take the decisions, and do-overs are too late? Margaret Hamilton, the first programmer hired for the Apollo project at MIT, explained:

Because software was a mystery, a black box, upper management gave us total freedom and trust. We had to find a way and we did. Looking back, we were the luckiest people in the world; there was no choice but to be pioneers; no time to be beginners.

During the Cold War when it was "nobody but us," our decisions and solutions were shaped by constraints. At Cray Research constraints and barriers pointed us to the best point of leverage. To remain the best in the world, we had no other option. But before considering leverage, we carefully identified and proved relevant capabilities. Those capabilities showed us what solutions might be plausible. We also found that if it wasn't fun, it probably was not worth doing.

This forced way of working, where responsibility could not be abstracted away, has been mostly lost to time.

My Role as Custodian of Lost Skills

I am bringing you those skills because they were never passed to the next generation. I created a primary source document showing what it was like: Nobody but Us: A History of Cray Research's Software and the Building of the World's Fastest Supercomputer. But I wrote a second primary source, reproducing the Cray Research skills for you right now, in 2026. The Wizard's Lens: Learn to Think Like AI is an apprenticeship drawing you in to experience, not merely read about, how we continuously "achieved the impossible" at Cray Research.

Those Cray Research skills did not begin with software, or even hardware. They began outdoors. Experiential education, with real risks and real consequences, has also been abstracted away. That is where judgement is formed. For this I wrote Surviving Spring Break on the Mountain: The Power of Experiential Education.

Pure Entertainment

If it isn't fun, it probably isn't worth doing. I continued practicing the most important debugging skill I know: spotting patterns and connections that others miss. I wrote Unexpected Histories to show you shifted perspectives, purely for entertainment, but showing real history that matters today. In each case, once you see it, you cannot "un-see" it.

Эдвард Барнард

Когда нет времени быть новичком

Каково это — стоять на переднем крае, когда больше некому принимать решения и на повторные попытки уже нет времени? Маргарет Хэмилтон, первый программист, нанятый для проекта Apollo в MIT, объясняла это так:

Поскольку программное обеспечение было загадкой, «чёрным ящиком», высшее руководство предоставило нам полную свободу и доверие. Мы должны были найти выход — и мы его нашли. Оглядываясь назад, можно сказать, что мы были самыми везучими людьми в мире: у нас не было выбора, кроме как быть первопроходцами; не было времени на ученичество.

Во времена холодной войны, когда всё сводилось к принципу «никто, кроме нас», наши решения и подходы формировались под давлением жёстких ограничений. В Cray Research именно ограничения и барьеры указывали нам на наиболее эффективную точку приложения усилий. У нас просто не было иного пути, кроме как стать лучшими в мире. Но прежде чем прилагать усилия, мы тщательно искали и проверяли соответствующие компетенции. Именно они показывали, какие решения вообще могут быть осуществимы. Мы также поняли: если дело не приносит удовольствия — вероятно, не стоит им заниматься.

Этот вынужденный стиль работы, при котором ответственность нельзя переложить на других, почти утрачен со временем.

Моя роль как хранителя утраченных навыков

Я передаю вам эти навыки, потому что они так и не были переданы следующему поколению. Я написал книгу воспоминаний о том, как это было на самом деле: Nobody but Us: A History of Cray Research's Software and the Building of the World's Fastest Supercomputer. («Только мы: история программного обеспечения Cray Research и создания самого быстрого суперкомпьютера в мире»). Но я написал и вторую книгу, возрождающую стиль мышления Cray Research для вас прямо сейчас, в 2026 году. The Wizard's Lens: Learn to Think Like AI («Линза волшебника: научитесь думать как ИИ») — это учебник, который погружает вас в атмосферу и дает опыт, а не просто рассказывает о том, как мы постоянно «достигали невозможного» в Cray Research.

Истоки подхода Cray Research лежат не в программном обеспечении и даже не в железе, а в холодной реальности жизни. Обучение через опыт, с реальными рисками и реальными последствиями, подвергнутое переосмыслению. Именно так формируется суждение. Об этом я написал книгу Surviving Spring Break on the Mountain: The Power of Experiential Education («Выжить на весенних каникулах в горах: сила обучения через опыт»).

Чистое развлечение

Если это не приносит удовольствия — вероятно, этим не стоит заниматься. Я продолжал практиковать самый важный навык профессионального отладчика, который знаю: замечать закономерности и связи, которые другие упускают. Я написал Unexpected Histories («Неожиданные истории»), чтобы показать вам смещенные перспективы — исключительно ради развлечения, но опираясь на реальную историю, которая имеет значение и сегодня. В любом случае, увидев это однажды, вы уже не сможете «развидеть» увиденное.

The Leanpub Podcast

Episode 317

An Interview with Edward W. Barnard

Material

Course Material

  • Part I: AI Training Ground

  • 1. Ford vs Ferrari Analogy to Cray

  • 2. Huge WWII Projects

  • 3. Patterns of Thought

  • Part II: AI Techniques Mastered

  • 4. Becoming the Revolutionizer

  • Try This Right Now

  • What Just Happened

  • A Personal Example

  • The Original Example

  • The Promise: What You Will Become

  • Barriers as Opportunities

  • How to Take This Course

  • Path 1: Immediate Results (Lessons 4-11)

  • Path 2: Deep Understanding (Lessons 4-22)

  • Path 3: Complete Mastery (All Lessons)

  • Reading Guidance

  • Sample Conversation

  • The Wizard’s Lens

  • A Note on Phrasing

  • What Comes Next

  • 5. The Ping Pong Effect

  • Counterintuitive Behavior

  • The Missing Piece

  • The Underlying Pattern

  • Specific Example: Naming the Effect

  • Try This Right Now (5 minutes)

  • Extended Conversation

  • Whiteboard Collaboration

  • Enthusiastic Responses

  • Exploring Intuition

  • What the Ping Pong Effect is NOT

  • Not Longer Conversations

  • Not Brainstorming

  • Not Rubber Ducking

  • Not Prompt Chaining

  • Not AI Tutoring

  • Is Sustained and Guided Collaboration

  • Back On Track

  • Claude Misses Half the Point

  • The Key Insight

  • Side Issue is Actually Central

  • Why Has Nobody Figured This Out?

  • How to Guide the Conversation

  • Exercise 1

  • How To Use Physical Analogies

  • Six-Part Structure

  • Summary

  • Exercise 2

  • Questions for Reflection

  • Quiz 1

    1 attempt allowed

  • 6. Same Skill Different Context

  • Publisher Acceptance

  • Encouragement

  • Nobody but Us

  • Ping Pong Effect

  • Chain of Associations

  • Exercise 3

  • AI Collaboration

  • Bad-Vibe Coding

  • Value in Inexperience

  • Technical Review

  • Constraint Transformation

  • Deeper Significance

  • Theory of Constraints

  • Case Study

  • Example: “Absolutely Not!”

  • Continuous Monitoring

  • Understand What You Are Closely Observing

  • Shifting to Holistic View

  • Exercise 4

  • Beyond Traditional Prompt Engineering

  • Exercise 5

  • The Competitive Edge in Practice

  • Summary

  • Exercise 6

  • Questions for Reflection

  • Personal Application

  • Technical Application

  • Experimentation

  • Quiz 2

    1 attempt allowed

  • 7. Familiar Techniques Applied Differently

  • Universal Crossover Skills

  • Taking the Long View

  • Science of Expertise

  • Prerequisite Mastery

  • Exercise 7

  • Whiteboard Discussion

  • Feedback Loop

  • Visualization

  • Exercise 8

  • Loud Whiteboards

  • Human/AI Boundary

  • Intractable Problems

  • Fitting the Problem Into a Box

  • Matched Expertise

  • Exercise 9

  • Identifying Specific Techniques For Your Use

  • Self Evaluation and Pushback

  • Using Known Skills

  • Riding Your Own Boundaries

  • You Drive the Conversation

  • Dangerously Faulty Hidden Assumptions

  • Exercise 10

  • Competitive Edge Through Crossover Skills

  • Summary

  • Exercise 11

  • Questions for Reflection

  • Personal Application

  • Technical Application

  • Experimentation

  • Exercise 12

  • Quiz 3

    1 attempt allowed

  • 8. Viewing Differently

  • Kung Fu Flashback

  • Holistic Thinking

  • If-Then Perspective

  • Exercise 13

  • The Slinky

  • The Slinky Viewed Differently

  • Ping Pong Effect

  • Derive the Implications

  • Identifying Timeless Skills

  • Exercise 14

  • The Time Travel Pattern

  • Exercise 15

  • The Competitive Edge of Multiple Perspectives

  • Exercise 16

  • Summary

  • Exercise 17

  • Questions for Reflection

  • Systems Thinking

  • IF … THEN Analysis

  • Time Travel Patterns

  • Practical Application

  • Quiz 4

    1 attempt allowed

  • 9. Local Memory Refresh

  • Oil Exploration

  • Seismic Exploration

  • Reservoir Simulation

  • New Magnetic Tape Technology

  • Exercise 18

  • Joining Cray Research Software Division

  • Mysterious Problem

  • Local Memory Congestion

  • High Impact Failure

  • Hypothesis

  • Exercise 19

  • Modern Application of Old Technique

  • The Need For Context Refresh

  • Exercise 20

  • Summary

  • Exercise 21

  • Questions for Reflection

  • Personal Experience

  • Technical Application

  • Experimentation

  • Quiz 5

    1 attempt allowed

  • 10. Connecting the Dots

  • As the System Unfolds Before You

  • The Correspondence to Large Language Model Elements

  • The Correspondence to Large Language Model Training Steps

  • Billy Mitchell and Miss Mitchell

  • Doolittle Funeral

  • Exercise 22

  • Interconnected Writing Projects

  • Motivation: Tour Guide

  • Oddly Relevant Choices

  • Hidden Agendas

  • Kenney Sets an Example

  • Omitted Information

  • Working Back in Time

  • Exercise 23

  • The Missing Piece: My Failed Attempts

  • Exercise 24

  • The Method That Worked

  • Exercise 25

  • Model of Large Language Model

  • Exercise 26

  • Physical Information Organization

  • Exercise 27

  • Summary

  • Questions for Reflection

  • Pattern Recognition and Knowledge Organization

  • Author Bias and Information Quality

  • Time Travel Patterns and Skill Preservation

  • Physical Models of Digital Systems

  • Deep Research and Mastery

  • Metacognitive Awareness

  • Application to AI Collaboration

  • Experimentation and Discovery

  • Quiz 6

    1 attempt allowed

  • 11. The Attention Mechanism

  • Road Versus Map

  • Training Data Cutoff Date

  • Importance of Careful Observation

  • Waypoint Details

  • Multiple Information Layers

  • Parallel and Equivalent Routes

  • Shifted Perspective Knocked My Socks Off

  • Same Pattern Different Context

  • Exercise 28

  • World Dynamics

  • Mental Models of Social Systems

  • Computer Models of Social Systems

  • Dynamic Behavior

  • Exercise 29

  • Summary

  • Exercise 30

  • Questions for Reflection

  • Mental Models

  • Practical Application

  • Systems Thinking

  • Experimentation

  • Exercise 31

  • Quiz 7

    1 attempt allowed

  • Part III: AI Techniques Discovered and Applied

  • The Road Not Taken

  • Career Professionals

  • College and Early Career

  • Winner Take All

  • The Origin Story: How #s Was Discovered

  • Why This Order Matters

  • The Revolutionary Proof

  • What You Are About to Witness

  • Why This Proof Matters

  • 12. How Do Large Language Models Actually Work?

  • 13. The Importance of Attitude

  • 14. The Conversation Begins: Discovering Systems Thinking

  • Training When Winner Takes All

  • Additional Crew Member

  • Exercise 32

  • Reading This Case Study: A Training Exercise

  • Close-Observation Checklist

  • Why Raw Transcripts Matter

  • Understanding Productive Versus Unproductive Digressions

  • About Claude’s Verbosity

  • Evolving Feedback Loop

  • The Wrong-Template Pattern

  • Your Assignment

  • Case Study Structure

  • The Inverted Order: Origin Before Teaching

  • Chronological Reality (March 2025)

  • Your Reading Experience

  • Why This Ordering Works

  • Why the Reverse Ordering

  • Demonstrating Mastery as Intuition

  • Tangential Digressions

  • Discerning the Patterns

  • Pilot Briefing

  • Connecting to #s

  • Our Respective Roles

  • Vision Document

  • Summary

  • Witnessed in This Lesson

  • Key Techniques Demonstrated

  • Critical Skill to Develop

  • Physical Analogies

  • Looking Ahead

  • Exercise 33

  • Quiz 8

    1 attempt allowed

  • 15. Refining a Mental Model Through Close Observation

  • Two-Part Responses

  • Exercise 34

  • Summary

  • Quiz 9

    1 attempt allowed

  • 16. Why Codebreaking Was Important

  • 17. The Breakthrough: Mapping the Apprentice Journey

  • The Impossible Task

  • Core Cognitive Skills of Wizard Thinking

  • Progressive Skill Development

  • Specific Cognitive Development

  • From Perception to Action

  • Off the Rails

  • Exercise 35

  • Lasting Insights

  • Key “Revolutionizer” Cognitive Patterns Worth Preserving

  • Exercise 36

  • Summary

  • Exercise 37

  • Questions for Reflection

  • Epilogue

  • Corollary

  • Quiz 10

    1 attempt allowed

  • Part IV: Accomplishing the Impossible

  • The Road Not Taken

  • Career Professionals

  • College and Early Career

  • Winner Take All

  • 18. Take Joy in the Challenge (Part One)

  • Lab Assignment

  • The Goal

  • Deeply Challenging

  • Large Language Model Insight

  • Token Management

  • When it Cannot be Done

  • Hidden Adventure

  • Hello World

  • Learn Quickly

  • Extreme Resource Limits

  • Visualizing Dimensions

  • Infinite Loop

  • Exercise 38

  • Memory Cleanup

  • Exercise 39

  • Summary

  • Exercise 40

  • Questions for Reflection

  • Resource Management Parallels

  • Mindset Application

  • Technical Understanding

  • Experimentation

  • Quiz 11

    1 attempt allowed

  • 19. Learning From Wilderness Travel

  • 20. Token Space Management (Part Two)

  • Exercise 41

  • Smoke on the Water

  • Exercise 42

  • Embracing Challenges

  • Exercise 43

  • Time Travel Patterns

  • Exercise 44

  • Summary

  • Exercise 45

  • Questions for Reflection

  • Resource Management

  • Embracing Challenges

  • Imagery and Understanding

  • Practical Application

  • Quiz 12

    1 attempt allowed

  • 21. Doing It Because It Has Never Been Done Before (Part Three)

  • Two Esoteric Lessons

  • Too Esoteric to be Lessons

  • The Pattern Revealed

  • Have Fun With the Challenges

  • Most Important Lesson

  • 22. Close Observation Yields Breakthrough Insights

  • Exposing More Associations

  • Adolescence of P-1

  • Jimmy Doolittle

  • Pappy Gunn

  • Fog

  • Not Triangulation

  • Working Demonstration

  • Exercise 46

  • Attention Mechanism: Template Pattern Trumped Reasoning Pattern

  • The Initial Prompt

  • The Transactional Response

  • The Loaded Question

  • Error Noted, But Intent Missed

  • Aftermath

  • Back Story

  • Exercise 47

  • Filtering Responses

  • Exercise 48

  • Summary

  • Questions for Reflection

  • Connecting to #s

  • Progressive Revelation and Verification

  • Pattern Recognition Across Contexts

  • Quiz 13

    1 attempt allowed

  • Part V: Mastery Independent of Technology

  • The Road Not Taken

  • Career Professionals

  • College and Early Career

  • Winner Take All

  • 23. Jolene’s Story

  • Human Training Data

  • Preview

  • The Beta

  • Nepal

  • Exercise 49

  • Grand Teton

  • Exercise 50

  • Audition

  • Exercise 51

  • Experiential Education

  • Standard of Judgment

  • Exercise 52

  • Summary

  • Quiz 14

    1 attempt allowed

  • 24. What did you learn about software development in the mountains?

  • 25. The Mountain

  • The Cliffhanger

  • Preparation and Practice

  • Exercise 53

  • Guide Your Own Interest

  • Exercise 54

  • Alpine Start

  • Exercise 55

  • The Teenage Mountaineers

  • Willi’s Toes

  • Exercise 56

  • Trip Leader

  • Summary

  • Quiz 15

    1 attempt allowed

  • 26. College Spring Break

  • The Goal

  • Exercise 57

  • Practice Climb

  • Exercise 58

  • Crevasse Rescue Training

  • Exercise 59

  • Up the Mountain

  • Exercise 60

  • What Goes Up Must Come Down

  • Exercise 61

  • 40 Years… and Back

  • Summary

  • Quiz 16

    1 attempt allowed

  • 27. Planning, Preparation, and Practice

  • Guiding Yourself

  • Climbing Mount Rainier

  • Planning and Preparation

  • Exercise 62

  • Visit the Park

  • Exercise 63

  • Physical Preparation

  • Practice

  • Exercise 64

  • Keep Learning

  • Transferring Perspective

  • Summary

  • Quiz 17

    1 attempt allowed

  • 28. Mastering the Craft

  • Deliberate Practice

  • Nathaniel Bowditch

  • Navigation

  • Exercise 65

  • John Harrison

  • Exercise 66

  • Extending the Craft

  • Exercise 67

  • Summary

  • Quiz 18

    1 attempt allowed

  • 29. Hands-On Learning

  • 30. Experiential Learning and Trust

  • Part VI: Becoming the Revolutionizer

  • 31. Choosing to Become

  • Prerequisite Skills

  • The “Revolutionizers” (1952)

  • Exercise 68

  • Shifted Perspective

  • FULL PURPLE

  • Dancing With the System

  • Exercise 69

  • Wizard Thinking

  • Quiz 19

    1 attempt allowed

  • Part VII: The Wizard’s Lens

  • 32. It’s Not Rocket Science

  • Secrets from Grade School

  • Third Grade

  • Fourth Grade

  • Summer School

  • Two Secrets

  • Planning, Preparation, and Practice

  • Make the Challenge Fun

  • Exercise 70

  • Bragging Rights

  • Exercise 71

  • Keeping the Boredom Away

  • The Impossible Challenge

  • What We Learned

  • Quiz 20

    1 attempt allowed

  • 33. Ed’s Attitude Toward Failure

  • 34. Engaging With Complex Systems

  • Provenance

  • Trailing Indicators of Mastery

  • Flow With the System

  • Core Elements

  • Exercise 72

  • Cognitive Transitions

  • From Linear to Systems Thinking

  • From Physical to Informational Battlefields

  • From Specialized to Integrated Knowledge

  • Exercise 73

  • Time Travel Patterns

  • Exercise 74

  • Mindset Elements

  • Joy-in-Challenge Orientation

  • Intellectual Flexibility

  • Exercise 75

  • Transforming Constraints to Revolutionary Devices

  • Comprehensive System Visualization

  • Problem Redefinition Around Core Constraints

  • Comprehensive Knowledge Mapping

  • Narrative Framework Construction

  • Exercise 76

  • Technical Implementation of Constraint Transformation

  • Memory Bank Limitations Become Pipelined Performance

  • Functional Unit Timing Becomes Instruction Interleaving

  • Instruction Fetch Limitations Become Instruction Buffers

  • Exercise 77

  • The Temporal Dimension of Constraint Transformation

  • Exercise 78

  • Practical Application Becomes General Approach

  • Exercise 79

  • The Seven Lessons of Mastery

  • Exercise 80

  • Quiz 21

    1 attempt allowed

  • 35. Patterns of Mastery Emerging From Both Humans and AI

  • Both Human and AI

  • Opposites In Tension With Each Other

  • Exercise 81

  • Quiz 22

    1 attempt allowed

  • Part VIII: Road Map

  • 36. Show and Tell

  • 37. Appendix A. HPC Tradecraft Road Map

  • The 1995 Barrier

  • Two Series

  • Book 1. The AI Coverup: Are We Really Hallucinating?

  • Book 2. Nobody but Us: A History of Cray Research’s Software and the Building of the World’s Fastest Supercomputer

  • Book 3. The Wizard’s Lens: Learn to Think Like AI

  • Book 4. Ethics in High-Stakes Environments: Personal Survival Within a Power Imbalance

  • Book 5. Unexpected Histories: Spotting Patterns and Making Connections That Others Miss

  • Book 6. Constraint-Based Design: An Unexpected Gateway to Understanding Modern LLM Architecture

  • UPDATE

  • APML

  • Adventurer Experience

  • Constraint-Based Design

The Leanpub 60 Day 100% Happiness Guarantee

Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.

See full terms...

Earn $8 on a $10 Purchase, and $16 on a $20 Purchase

We pay 80% royalties on purchases of $7.99 or more, and 80% royalties minus a 50 cent flat fee on purchases between $0.99 and $7.98. You earn $8 on a $10 sale, and $16 on a $20 sale. So, if we sell 5000 non-refunded copies of your book for $20, you'll earn $80,000.

(Yes, some authors have already earned much more than that on Leanpub.)

In fact, authors have earned over $15 million writing, publishing and selling on Leanpub.

Learn more about writing on Leanpub

Free Updates. DRM Free.

If you buy a Leanpub book, you get free updates for as long as the author updates the book! Many authors use Leanpub to publish their books in-progress, while they are writing them. All readers get free updates, regardless of when they bought the book or how much they paid (including free).

Most Leanpub books are available in PDF (for computers) and EPUB (for phones, tablets and Kindle). The formats that a book includes are shown at the top right corner of this page.

Finally, Leanpub books don't have any DRM copy-protection nonsense, so you can easily read them on any supported device.

Learn more about Leanpub's ebook formats and where to read them

Write and Publish on Leanpub

You can use Leanpub to easily write, publish and sell in-progress and completed ebooks and online courses!

Leanpub is a powerful platform for serious authors, combining a simple, elegant writing and publishing workflow with a store focused on selling in-progress ebooks.

Leanpub is a magical typewriter for authors: just write in plain text, and to publish your ebook, just click a button. (Or, if you are producing your ebook your own way, you can even upload your own PDF and/or EPUB files and then publish with one click!) It really is that easy.

Learn more about writing on Leanpub