In addition to the books listed I've found I learned more by watching youtube videos. The best teachers are
Mrpete222, old high school shop teacher (at least reminds me of one)
oxtoolco, excellent, my personal favorite
abom77,
Joe Pieczynski, shop owner, excellent examples on machining and work holding for difficult applications. He also covers some CNC. Best tutorial on threading
Keith Fenner
I follow a lot more than this list, lots of great content on youtube. I tend to pickup many tips just watching how a pro does it. Learned Tig welding the same way. Better than reading a book, only thing better would be having someone in the shop in person.