1939-1945 1944 1947- 1958- 20thcentury adventure alberto atheletes athletes athletic-research athletics atletas automobiletravel band barefoot-running bill biography book carreras christopher coppercanyonregion correr daring endurance endurance-athletes fitness frank greek guidebooks heroes history historytranscontinentalfootrace(1st:1928) human-potential indiansofmexico indigenous-tribes injury-prevention inspirational kidnapping long-distance-running long-distancerunners lost marathonrunning mcdougall mexican-tarahumara mexico misfits natural natural-movement newyorktimesbestseller non-fiction nonfiction nyt:paperback_nonfiction=2011-03-26 outdoor-sports perseverance philosophy physicalfitness recreations rodgers runners running running-culture running-shoes running-technique runningraces salazar secrets self-discovery shorter soldiers sports sports-psychology strength tarahumaraindians tarahumaras training ultramarathons ultrarunning undergroundmovements unitedstates world-war-ii worldwar