"Tarzan, lord of the jungle" by Edgar Rice Burroughs is a novel first published in 1927-1928. Deep in the African mountains, Tarzan discovers a hidden valley where European knights and crusaders live frozen in time, maintaining their medieval ways centuries after losing their path to the Holy Land. Now divided into warring factions, these lost warriors face the legendary jungle lord in a clash between ancient chivalry and primal wilderness. Tarzan's lion companion Jad-bal-ja joins the adventure. (This is an automatically generated summary.)
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.