A one-time sports supplement entrepreneur who took the book bestseller lists for a ride with Four Hour Work Week — quit answering so many e-mails! — and then again with Four Hour Body — eat red meat, hello unbridled virility! — Tim Ferriss is clearly unfamiliar with the concept of specialization. In addition to being a career and fitness guru, he set world records in tango and regularly doles out info on his Experiments in Lifestyle Design blog on Mac viruses, luxury vacations on the cheap, and applying the philosophical lessons of Seneca to everyday life. The wisdom is always presented in the form of first person findings, a manic mishmash of Ferris’ life less ordinary.