The Ultra Mindset: An Endurance Champion's 8 Core Principles for Success in Business, Sports, and Life John Hanc4.1
The Oxygen Advantage: The Simple, Scientifically Proven Breathing Techniques for a Healthier, Slimmer, Faster, and Fitter You Patrick McKeown4.4
A Joosr Guide to... Born to Run by Christopher McDougall: A Hidden Tribe, Superathletes and the Greatest Race the World has Never Seen Joosr5