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...