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About This Book

Most analysts spend more time preparing data than analyzing it.

This book shows you how to change that.

Data Transformation with Power Query is the third volume of the Excel for Data Analytics & Business Intelligence Pathway and the definitive guide to building professional, refreshable, and auditable data preparation pipelines inside Microsoft Excel.

Instead of relying on repetitive copy-and-paste operations, fragile formulas, and manual data cleaning, you will learn how to automate the entire preparation process using Power Query and the M language. Every transformation becomes documented, reproducible, and reusable—turning hours of repetitive work into a single-click refresh.

Inside this book, you will learn how to:

Connect to Excel files, CSV files, databases, folders, web data, and other data sources.
Build professional ETL (Extract, Transform, Load) pipelines.
Clean, profile, validate, and reshape messy data.
Merge and append data from multiple sources.
Master the Applied Steps architecture and the M language.
Design parameterized, maintainable, and production-ready Power Query solutions.
Prepare high-quality data for Power Pivot, DAX, Power BI, and enterprise analytics.

Unlike books that teach Power Query as a collection of ribbon commands, this volume teaches it as a professional data engineering discipline. The focus is not merely on using the software—it is on designing robust data preparation systems that can be trusted, audited, and maintained.

This book is ideal for:

Data Analysts
Business Intelligence Professionals
Financial and Operations Analysts
Power BI Developers
Excel Power Users
Business Analysts
Anyone who works with recurring reports and messy data

Whether you are preparing data for Excel dashboards, Power BI models, SQL-based analytics, or enterprise reporting, this book will help you replace manual work with automated, repeatable analytical pipelines.

Professional analytics begins with clean data. This book teaches you how to build it.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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