Robotics

Principles of Robot Motion, Howie Choset
Modern Robotics: Mechanics, Planning, and Control, Kevin Lynch
Introduction to Autonomous Mobile Robots, Roland Siegwart
Planning Algorithms, Steven M. La Valle
A Gentle Introduction to ROS, Jason M. O'Kane

Algorithms

The Algorithm Design Manual, Steven Skien
Introduction to Algorithms, Thomas Cormen
Algorithms, Robert Sedgewick
Grokking Algorithms, Aditya Bhargava
Data Structures and Algorithms in Python, Michael T. Goodrich

Functional Programming Paradigm

Land of Lisp: Learn to Program in Lisp, One Game at a Time!, Conrad Barski

Electronics

Practical Electronics for Inventors, Paul Scherz
The Art of Electronics, Paul Horowitz

Drones

DIY Drones for the Evil Genius: Design, Build, and Customize Your Own Drones, Ian Cinnamon
Make: Drones: Teach an Arduino to Fly, David McGriffy
The Complete Guide to Drones: Whatever your budget - Build + Choose + Fly + Photograph, Adam Juniper

Artifical Intelligence

Artificial Intelligence: A Modern Approach, Stuart Russell and Peter Norvig

Motion Planning

Robot Motion Planning, Jean-Claude Latombe, Kluwer Academic Publishers, 1991.
Planning Algorithms, Steven M. LaValle, Cambridge University Press, 2006.