I've read a lot of golf books as a competitive golfer. Here are the ones that helped me game the most.
Learn how to shift your mindset in order to get out of a slump in golf.
Learn some advanced tips on how to get your great swing from the range to the golf course, and shoot lower scores.
Zen Golf, a book by Dr. Joseph Parent is an excellent collection of strategies and exercises to keep your mind in check on the course and shoot lower scores.