Kicad Like a Pro A Comprehensive Hands-on Guide for Learning the World's Favourite Open Source Printed Circuit Board Design Tool.

If you have never used KiCad and have little or no experience in PCB design, you should read this book it in a linear fashion. The first few chapters will give you the fundamental knowledge on which you will build your skill with the projects later in the book.
If you have a good working knowledge of PCB design, but you are new to KiCad, you can learn about the KiCad fundamentals in in the middle of the book, and then continue with the projects.
To get the full benefit of the book, you should consider the complementary video course. This course spans over 30 hours of high-definition video, with detailed explanations and demonstrations of all projects featured in the book. The video lectures capture techniques and procedures that are just not possible to do so in text.

Covers the latest KiCad version

The KiCad development team released KiCad 6 RC1 in November 2021, and 6.0 in December 2021. This is the largest release of KiCad ever. KiCad 6 is full of improvements and new features, including a new file format, a refreshed user interface (with a new theme editor), a new schematic editing paradigm, field name templates and text variables, and much more.
I wrote this book using KiCad 6.