"Tarzan and the Lost Empire" is the twelfth book of the enormously popular twenty-four volume Tarzan series of novels by adventure fiction writer Edgar Rice Burroughs. Tarzan, created by Burroughs in 1912, is among the most popular fictional characters in all of literature and his tales have been adapted into dozens of animated and live-action films as well as television and radio series and comic books.

In this story, Tarzan is called upon to help rescue a German archaeologist who has disappeared into the jungle. In exploring the area where the archaeologist went missing, Tarzan stumbles upon the remains of an ancient settlement of the Roman Empire and finds himself caught between two rival kingdoms struggling for dominance. Captured and forced to fight as a gladiator in order to survive, Tarzan decides to foment a rebellion and overthrow the evil ruler of the titular Lost Empire.

"Tarzan and the Lost Empire" is presented here in its original and unabridged format and features a Foreword by Burroughs scholar Camille Cazadessus, Jr.