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Christopher McDougall Natural Born Heroes

Ben Greenfield Boundless

Mark Sisson, Brad Kearns Primal Endurance

Luke Humphrey Hansons Marathon Method: A Renegade Path to Your Fastest Marathon

Mark Sisson, Brad Kearns Primal Endurance

Luke Humphrey Hansons Marathon Method: A Renegade Path to Your Fastest Marathon

Greg Hoffman Emotion By Design: Creative Leadership Lessons from a Life at Nike

Koerner Hal Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond

Timothy Ferriss Tools Of Titans: The Tactics, Routines, and Habits of Billionaires, Icons, and World-Class Performers