Jason Schenk

Can’t Hurt Me, David Goggins’ smash hit memoir, demonstrated how much untapped ability we all have but was merely an introduction to the power of the mind. In Never Finished, Goggins takes you inside his Mental Lab, where he developed the philosophy, psychology, and strategies that enabled him to learn that what he thought was his limit was only his beginning and that the quest for greatness is unending.

Mat Fraser is undisputedly the fittest man in CrossFit history for winning the CrossFit Games an unprecedented five times. A student of engineering, Fraser optimized his body like a machine, and his absolute dedication to the training program he designed for himself is now legendary. Fraser became a master of identifying his weaknesses and then seeking out training methods to improve them, and he's idolized in the fitness community for his relentless pursuit of peak performance. It's not hard to see why he achieved so much success - but how is a different question.