‘Tarzan the Terrible’ is a novel written by Edgar Rice Burroughs, the eighth in his series of books about the title character Tarzan. It was first published as a serial in the pulp magazine ‘Argosy All-Story Weekly’ in the issues for February 12, 19, and 26 and March 5, 12, 19, and 26, 1921; the first book edition was published in June 1921 by A. C. Mc Clurg. Its setting, Pal-ul-don, is one of the more thoroughly realized ‘lost civilizations’ in Burroughs’ Tarzan stories. The novel contains a map of the place as well as a glossary of its inhabitants’ language.