Tarzan and the Madman is a novel by American writer Edgar Rice Burroughs, the twenty-third in his series of twenty-four books about the title character Tarzan. Written from January to February 1940, the story was never published in Burroughs' lifetime. It was first published in hardcover by Canaveral Press in June 1964, and in paperback by Ballantine Books in February 1965. Source: Wikipedia (en)