Free eBook: Drone University [Kindle Edition]

This book makes it easy to design and build your own drone. The book breaks down all the required and optional components into six easy to understand sub-systems; Airframe System, Radio Control / Autopilot System, Power System, Camera System, Power System, Ground Control Station, and the Drive Train System. Other chapters will provide flying tips, check lists and a many surprises in-between.
tl;dr - It's an A-Z guide of the drone's systems and a guide to make your own autonomous airplane or multi-copter, and includes DIY recipes, tips and etc.