KDE Developer Guide
The KDE Developer Guide is a book to give you an easy start into contributing to KDE as a developer.
20 Years of KDE: Past, Present and Future
Editor: Lydia Pintscher
Licensed under Creative Commons Attribution-ShareAlike 3.0
KDE Frameworks Cookbook
The KDE Frameworks Cookbook is a book for developers who want to make use of KDE's Frameworks in their applications. You can download it ePub, HTML or PDF copies from here.
To contribute to the book clone the repository kde:kf5book, commit your content in markdown, then push. Please look at the README for more detailed information.