While reading books is by no means a requirement to being a serious or competitive golfer, a little written wisdom never hurt anyone. If you're someone who doesn't want to read anything about technique or drills or anything swing related, you're in luck: none of the books have anything to do with your golf swing, and everything to do with the mental game, your physical health, and how to overcome the hurdles that all professionals face, regardless of vocation. Here are my top 5 books, with no order of preference:
1) Every Shot Counts by Mark Broadie:
Easily the most revolutionary book regarding golf strategy and the truth about what makes great players great. By reading this book, you'll understand how the Strokes Gained statistics can alter the way you approach every shot of every tournament.
2) Core Performance Golf by Mark Verstegen
Being a golfer nowadays makes you an athlete, so it'll help to approach the game like one. Loaded with routines that will help you become stronger, more flexible, and less prone to injury. Along with tips on how to fuel up before, during, and after a round, this book serves as the comprehensive guide to making the most of your physical ability.
3) Golf is Not a Game of Perfect by Dr. Bob Rotella
Arguably a classic in golf/sports psychology, this book will help you find the tools you need to unlock your full mental capabilities and play your best golf.
4) The Champion's Mind by Jim Afremow, PhD
A more modern approach to sports psychology, filled with several tips to help players reach the top of their chosen sport. While not specifically tailored to golf, it's still a worthwhile read for the serious player.
5) The War of Art by Steven Pressfield
Written by the author of golf novel Bagger Vance, this book is a must-read for anyone who is pursuing an art, sport, or craft. Golf falls somewhere in between all three. For anyone who has felt "Resistance", reading this book will help you overcome any negativity.