IIf you like what I do and what to read into extreme detail about it I co-authored a book! You can find it where books are sold.
Amazon: https://www.amazon.com/Raspberry-Pi-Retro-Gaming-Consoles/dp/1484251520/ref=sr_1_1?keywords=9781484251522&qid=1576509878&sr=8-1
Publisher's site: https://www.apress.com/us/book/9781484251522