Obstacle racing

Zed the Zebra (64 Zoo Lane)

An Vrombaut

Get set! Go!

Story by Shigeo Watanabe ; pictures by Yasuo Ohtomo.

The Ultimate Parkour & Freerunning: Discover Your Possibilities

Alexander Pach, Jan Witfeld, Ilona E. Gerling

Extreme Trials Biking

Virginia Loh-Hagan

Get Muddy: Personal Stories of Obstacle Course Racing

Gail Waesche Kislevitz

Down and dirty: the essential training guide for obstacle races and mud runs

Matt B. Davis ; foreword by Matt Keneally, director of Rise of the sufferfests

Become an American ninja warrior: the ultimate insider's guide

the experts and competitors of American Ninja Warrior

Ultimate Obstacle Race Training Crush The Worlds Toughest Courses

Brett Stewart

Snowboarding slopestyle

by Thomas K. Adamson

Mud, guts & glory: tips & training for extreme obstacle racing

Mark Hatmaker with Doug Werner