The seventh in his series of books about the title character Tarzan. It was originally published as two separate stories serialized in different pulp magazines; "Tarzan the Untamed" in Redbook from March to August, 1919, and "Tarzan and the Valley of Luna" in All-Story Weekly from March to April 1920. The two stories were combined under the title of the first in the first book edition, published in 1920 by A. C. McClurg.