A Stranger in the Mirror is a 1976 novel written by Sidney Sheldon. The novel is one of the earliest Sheldon's works, but contains the typical Sheldon fast-paced narration and several narrative techniques with the exception of a twist ending. The novel tells the life story of two fictitious Hollywood celebrities - Toby Temple and Jill Castle, portrays the emotional extremes of success and failure and how people inevitably become victims of time.