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...
Kick off your book project in 2 hours, get started with GhostAI in 2 hours, or do both! Free live workshops, on Zoom. You’ll leave with a real book project and a clear plan to keep going. Saturday, June 27, 2026.
Interested in this book? Show your support by saying what you'd like to pay for it!
About the Book
If you have use System.out.println or previous versions of Apache Log4j: you are welcome to this book. Learn how you use Log4j and even how you can extend it. This book will help you to start with the brandnew Log4j 2 and help you to migrate your old logging code to the new framework.
I am considering to write this book in a lean way: publish a chapter when it is done. If you consider buying this book early you'll get a better price but you'll also have to deal with some spelling errors as I am not a native speaker. The final version of this book will be edited and hopefully almost error free.
PLEASE NOTE:
I am considering to put a lot of effort into this book if enough people show interest in it. If you have would like to see this book written add your name to the books mailinglist on this page.
About the Author
Christian sold his first website back in 1998. Since then he worked as a web developer, a consultant, an architect, a manager, a tester, and much more. He has had many different customers: banks, tiny companies, and huge merchants. He has worked in open spaces together with eighty other people and alone in his home office. At a time when he worked seventy-five hours a week and could have become an actor in a Zombie movie without makeup, he started practicing Zen and wrote The Zen Programmer.
Today, Christian is building up his own company and provides freelancer services. In his free time, he practices Zen and studies Psychology at a German university.
Furthermore he is deeply involved in Open Source development. He spends a lot of his time at the Apache Software Foundation and contributes to Apache Log4j. He is the current V.P. Apache Logging Services and simply happy to work so many talented people at the project.
Within 60 days of purchase you can get a 100% refund on any Leanpub purchase, in two clicks.
See full terms...
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
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
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.