50/50, Secrets I Learned Running 50 Marathons in 50 Days -- and How You Too Can Achieve Super Endurance!, Grand Central Publishing, Dean Karnazes,Running and jogging,Active outdoor pursuits and activities, ,, , United States, en-UShttps://www.hachettebookgroup.com, [BLURB],[CITY],New York,books, ebooks, biblet, Book2look