This looks like a fun book (that my library so far won't order..):

Classic Game Programming on the NES: Make your own retro video game

by Tony Cruise -- published 2024.

https://www.manning.com/books/classic-game-programming-on-th...

Do you have an amazing idea for a NES game you’ve been itching to turn into reality? Classic Game Programming on the NES will show you how. This all-practical beginner's guide is full of step-by-step guidance on everything from graphics and music, to enemy AI, to the 6502 Assembler language you need to get the most out of the NES.

https://www.amazon.com/dp/1633438015