Rickson Gracie is the New York Times bestselling author of Breathe. A member of the most prominent martial arts family of all time, Gracie reigned as world Jiu Jitsu champion in both the middle heavy weight and open divisions for almost two decades. Since retiring with an undefeated record, he has focused on unifying and spreading his family martial art through his Global Jiu Jitsu Federation.

Peter Maguire is the author of Law and War, Facing Death in Cambodia, Thai Stick,and Breathe. Maguire has taught the law and theory of war at Columbia University, Bard College, and University of North Carolina at Wilmington. He is the founder and director of Fainting Robin Foundation. Maguire received his blackbelt from Rickson Gracie and has been his friend and student for over 30 years.