A popular and prolific writer of fiction for children and young adults, William Sleator is regarded as a particularly original and imaginative author whose works use the genres of fantasy, mystery, and science fiction to explore personal relationships and growth. Sleator incorporates current scientific theories, suspense, and the supernatural in his books, which challenge readers to take active roles in the stories while allowing them to resonate with the feelings and experiences of his characters. Depicting boys and girls who are often reluctant heroes, Sleator takes his characters from their everyday lives into confrontations with unusual, even unnerving situations. His protagonists encounter alien beings, doppelgangers, ESP, telepathy, telekinesis, black holes, evil spirits, malevolent dolls, weird scientific experiments, time travel into the past and the future, and other strange phenomena. In addition, the characters must learn to deal with their brothers and sisters--sibling rivalry is a consistent theme--as well...