Tarzan the Terrible is a novel by American writer Edgar Rice Burroughs, the eighth in his series of twenty-four 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. McClurg. 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.