Everything you need to understand or teach All the Myriad Ways by Larry Niven.
"All the Myriad Ways" tells of a police investigator's effort to understand why multimillionaire and owner of Crosstime Corporation, Ambrose Harmon, would kill himself. Harmon's suicide is eventually linked to a series of recent suicides in the area that far exceed normal incidents of the sort. The story does not merely relate the police investigation, but is also an exploration of the concept of alternate universes and an examination of the idea of the importance of cause and effect in understanding human behavior. The language moves at a sprightly pace and the concepts explored in the narrative are exciting.(read more)