William Sleator

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 he finds an ancient, egg-shaped object with which he travels back and forth in time, eleven-year-old Tycho grapples with several terrible futures he sees for himself and his family.

Eighteen-year-old Sam falls in with his mother's bizarre scheme to revitalize his younger brother Humphrey's flagging career as a piano prodigy, and agrees to compose "new works" by a long dead composer and present them to his brother as the dictations of a ghost. The scheme is a success--until some ghostly occurrences convince Sam that the spirit of the dead composer has actually taken over Humphrey's fingers

Five sixteen-year-old orphans of widely varying personality characteristics are involuntarily placed in a house of endless stairs as subjects for a psychological experiment on conditioned human response.

Vicky is disappointed in her birthday gift of a dollhouse, but she experiences real terror when she is drawn into the house and the lives of its malicious inhabitants.

When she opens two strange boxes left in her care by her mysterious uncle, fifteen-year-old Annie discovers a swarm of telepathic creatures and unleashes a power capable of slowing down time.

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 fifteen-year-old Doug and his younger sister Colette move with their parents to a forested wilderness area, they encounter some weird creatures whose lives are endangered.

Darlene's stories sound unbelievable but she insists they are all true.

To end the bad luck that fifteen-year-old Dom and his parents have been experiencing since their arrival in Thailand, Dom and his new friend Lek search for a jade carving that must be returned to its shrine to appease an angry Thai spirit.