William Sleator

When his best friend dies in a plane crash, sixteen-year-old Ken has a ritual performed that will make him invulnerable, but soon learns that he had good reason to be suspicious of the woman he paid to lock his soul away.

When aliens abduct both Leo and his artist friend Tim, Leo tries to determine why these creatures from outer space want particularly to use his friend's talent.

Living in a dreary new home with his father dead, his mother hospitalized, and his grandfather increasingly distant, fourteen-year-old Isaac's wish for someone to reach out to him comes true in the form of a phantom arm that appears in a mirror box designed to help amputees, warning of danger.

When her desperately ill older brother insists that she take him into their mysterious backyard garden, designed by their quantum physicist great uncle, fourteen-year-old Susan discovers that things are not always what they seem.

A teenager becomes interested in a strange board game called "Interstellar Pig," the obsession of his new and unusual neighbors, and he soon stumbles into a nightmare when he discovers that the game is real.