Rener Gracie was born into the family that founded Brazilian jiu-jitsu and the UFC (Ultimate Fighting Championship). In 2009, with the help of his brother, Ryron, he created Gracie University, the first interactive online learning center for Brazilian jiu-jitsu.
Paul Volponi is the award-winning author of twenty books, including the novels The Final Four (on the NYC Chancellor's reading list NYC Reads 365), Top Prospect (part of Scholastic's nationwide book club), and Black and White (winner of the international Reading Association's Children's Book Award).
Jocko Willink served as a Navy SEAL for twenty years. He fought in the Iraq War. For his efforts during the Battle of Ramadi and throughout his career, he was awarded numerous medals including the Silver Star and the Bronze Star. When Willink returned home, he served as a Navy SEAL instructor. Jocko retired from the Navy in 2010 and launched Echelon Front with Leif Babin. He uses his expertise to teach leadership beyond the military and serves as an executive coach. He is the author, along with Leif Babin, of Extreme Ownership: How U.S. Navy SEALS Lead and Win, and The Dichotomy of leadership: Balancing the challenges of extreme ownership to lead and win.