Excerpt:"Shortly after Lance Armstrong began winning Tours de France, I asked one of his close advisers what, exactly, had changed. How had an inconsistent star morphed into a rider who could dominate the three-week Tour from beginning to end? "He's improved his aerobic system," this person said, as if none of his competitors had ever thought to do that (by, say, training).

David Walsh is pretty sure he knows how Lance "improved his aerobic system." His magnum opus, From Lance to Landis: Inside the American Doping Controversy at the Tour de France, is at once fascinating, disturbing, and problematic. This is Walsh's third joust at Armstrong, but the first to be published in English. Even after discounting Walsh's obvious bias and sometimes weak sourcing (think Kitty Kelley meets Michael Moore), his evidence is disturbing. There's no smoking gun—nobody stepping forward to say, yes, they saw Armstrong inject himself—but there is an awful lot of smoke. "