Mark Cavendish is fast. Known as the world’s fastest sprinter he’s penned his second book, At Speed: My Life in the Fast Lane, which chronicles his days as a “fat” kid to his winningest Tour de France sprinter. It also offers up a personal look that at his screaming fights with teammates, his rancorous contract negotiations, crushing disappointments and his often testy relationship with the media. But it also shows that for Cavendish… winning is always the cure.