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. The story 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.