Because, and I did not know this until now, Great Britain (Chris Cleave is British) dominates the sport, grabbing seven of the 10 medals in track cycling. As I said before, Gold’s believability is not low. You can imagine talking like coach Tom, and anticipate the feelings of Kate and Zoe. But good fiction surprises us as it swings us from verisimilitude to artifice—what the great critic James Wood calls the not quite effect.