Or see Anamorph (disambiguation). Animorphs is an English language science fiction series of young adult books written by K. A. Applegate and published by Scholastic. It is told in first person, with all 6 main characters taking turns narrating the books through their own perspectives. Horror, war, dehumanization, sanity, morality, innocence, leadership, freedom, and growing up are the core motifs of the series. Published between June 1996 and May 2001, the series consisted of 54 books and includes ten companion books, eight of which fit into the series' continuity (the Animorphs Chronicles and Megamorphs books) and two that are gamebooks not fitting into the continuity (the Alternamorphs books). The series was originally conceived as a three-part series called The Changelings, in which Jake is named Matt, and his little brother Joseph takes the place of Cassie.