Developing 2d games with unity: independent game programming with C#by Jared Halpern, 2018
Game design theory & practice (2nd ed.)by Richard Rouse III,
Holistic game development with unity: all-in-one guide to implementing game mechanics, art, design and programming (3rd .ed.)by Penny de Byl, 2019
Physics for game developers: science, math, and code for realistic effects (2nd ed.)by David M. Bourg & Bryan Bywalec, 2013
Python, PyGame, and Raspberry Pi game development (2nd ed.)by Sloan Kelly, 2019