Planet of the Apes was based on Pierre Boulle's 1963 science fiction novel of the same name.
The screenplay by Michael Wilson and Rod Serling was loosely based on the 1963 French novel La Planète des Singes by Pierre Boulle.
La Planète des Singes , known in English as Planet of the Apes and Monkey Planet , is a 1963 science fiction novel by French author Pierre Boulle.
