"The Mind Gym: An Athlete's Guide to Inner Excellence" by Gary Mack and David Casstevens - This book offers practical advice and strategies for developing mental toughness and focus, and includes insights from top athletes and coaches.
"How Bad Do You Want It? Mastering the Psychology of Mind over Muscle" by Matt Fitzgerald - This book explores the role of mental toughness in endurance sports and provides practical strategies for developing mental strength and focus.
"Endure: Mind, Body, and the Curiously Elastic Limits of Human Performance" by Alex Hutchinson - This book delves into the science of endurance and explores the relationship between the mind and body in achieving peak performance.
"The Inner Game of Tennis: The Classic Guide to the Mental Side of Peak Performance" by W. Timothy Gallwey - While not specifically about running or endurance sports, this book offers valuable insights into the mental game of sports and how to improve focus and performance.