'Tarzan the Terrible' was written by Edgar Rice Burroughs and printed in 1921. Tarzan is in search of his wife Jane and to do this he meets different races of civilized people. He helps them fight battles and solves some of their problems. He has followed his mate to Pal-ul-don, a hidden valley in which he traces a land of dinosaurs and men also even stranger humanoids with tails. With the achievements and skills of Tarzan they named him Tarzan-Jad-Guru (Tarzan the Terrible) which is the title of the book. In the end, Tarzan and Jane are rescued by their son Korak, who has been inquiring for Tarzan just as Tarzan has been inquiring for Jane. She becomes a centerpiece in a religious power struggle with the aid of his native allies. Tarzan continues to follow his beloved, going through an enlarged series of fights and escapes to do so.