Those of us for whom the Great Outdoors is the walk from front door to car door need to read Christopher McDougall.
He's the Bear Grylls (a name I originally thought referred to a barbecue) of fitness, urging us out of our recliners to learn the mystic resources of our bodies through tracks, trees and mud-runs.
He's been inspired by the World War II band of British poets, archaeologists and professors who kidnapped a German general on Crete, after "catapulting themselves to superhuman strength and fitness".
Such deeds lead McDougall to define heroism as a set of skills to which we can all aspire. You just have to discover the art of natural movement and the potential of your fascia profunda. (No, I'm not telling you.) Getting away from exercise machines and into "hunter-gatherer movements" is also desirable.
Via an eclectic mix of war history, Philosophy 101 and New Age self-discovery, we're offered a range of heroic role models including Patrick Leigh Fermor, a Cretan priest with a Glock in his sock, and the Norwegian commando who cut off nine of his frost-bitten toes. Oh, and Xena, Warrior Princess.