Relentless: From Good to Great to Unstoppable Review "Tim Grover is the master of mental toughness. This book is the blueprint for discovering what you are capable of achieving, getting results you never imagined, reaching the highest level of success---and then going even higher." ---Kobe Bryant 				    	 					 About the Author Tim S. Grover is world-renowned for his work with championship and Hall of Fame athletes and is an international authority on sports performance and motivation. Since 1989, he has been CEO of Attack Athletics, the legendary training philosophy that teaches excellence, commitment, and the concept of "don't think" to elite athletes and business professionals around the world.