“Bone Clocks” (“Ordinary Mortals”) is a novel-maze—once you plunge into it, you definitely won’t get bored. You’ll encounter unexpected discoveries, unpredictable plot twists, and meeting colorful heroes, many of whom fans of Mitchell will recognize from his previous novels. The premise of the story is this: in 1984, the main heroine, Holly Sykes, can no longer tolerate her mother’s flaws. The girl makes an extreme decision—she runs away from home. On that, the realistic part of the story ends. From then on, something will happen to Holly that could never happen to ordinary mortals.