The Arm of the Starfish
 The Arm of the Starfish is a young adult novel by Madeleine L'Engle first published in 1965. It is the first novel featuring Polly O'Keefe and the O'Keefe family a generation after the events of A Wrinkle in Time (1962). The plot concerning advanced regeneration research puts this novel in the science fiction genre but it could also be described as a mystery thriller.