Eddy Merckx is to cycling what Muhammad Ali is to boxing or Pele to soccer: simply the best there has ever been. Merckx amassed an astonishing 445 victories. Lance Armstrong, by comparison, managed fewer than 100. Merckx didn’t just beat his opponents; he crushed them.            But his triumphs only tell half a story that includes horrific injury, a doping controversy, and tragedy. He was nicknamed “the Cannibal” for his insatiable appetite for victory, but the moniker did scant justice to a man who was handsome, sensitive, and surprisingly anxious.            A number-one bestseller in the United Kingdom, Half Man, Half Bike is the definitive story of a man whose fear of failure drove him to the highest pinnacles before ultimately destroying him.