There are so many great books on golf instruction that cover different areas of the game.
I recommend Jim McLean’s Eight Step swing book and Mike Adams Cracking the golf swing code for the full swing.
Anything by Dr. Bob Rotella is a good book to read for the mental game.
Iain Highfield, Matthew Cooke, Arick Siegel, and Zach Parker did a book on how to take your game to the course: Golf Practice- How to practice golf and take your range game to the course.