Otis Adelbert Kline: 42 books

A simple help wanted ad, leads a expert climber to the elixir of life… or is it?

What was the origin of races? Did all of us--Yellow, Black and White--start our generations in similar manner? How far afield of the truth are anthropologists?

Planet of Peril, Prince of Peril and Port of Peril all in one volume!

Robert Grandon was suddenly transported to the mysterious and perilous planet of Venus…

Kidnapped as infant, raised in a menagerie by a mad doctor was Jan escaped into the jungle…

When the most powerful artillery, deadly bacteria and explosives known, and the most destructive methods available fail to be effective against some enemy's unknown weapon of war, it is time, very frequently, to turn to some simple means of combat and attack. Paradoxically, though, it is the simple...

Jerry Morgan's amazing trip to the distant past of mars!

Jan goes to India on a new Adventure!

In Swordsman of Mars, Harry Thorne, outcast scion of a wealthy East Coast family, seeks the greatest adventure of his life. He exchanges bodies with his look-alike, Martian Sheb Takkor, and is transported millions of years into the past to a Mars peopled with mighty warriors, beautiful women, and...

IT all comes back to me as I take up my pen—a horrid shriek of pain and terror from high in the air, an enormous thing, taller than a tree, silhouetted against a background of lightning-illuminated storm clouds, like some gigantic tumble-weed, striding over the jungle, walking on its branches. And...

The Age of Miracles produces an amazing suicide and a triumphant return from death. A million dollar prize is offered—and won—for the most perfect automation.

Silently, without warning they came,those fishermen of deep space who spread their net for man—living flying saucers the Earth must destroy—yet who multiplied by dying!

UNCLE JIM was dead. I could scarcely believe it, but the little yellow missive, which had just been handed to me by the Western Union messenger boy, left no room for doubt. It was short and convincing: COME TO PEORIA AT ONCE. JAMES BRADDOCK DEAD OF HEART FAILURE. CORBIN & ILLIS, ATTORNEYS. I should...

Through the discoveries of the scientist, Dr. Morgan, a young Martian's astral body is projected into the body of one Harry Thorne on Earth, and from Earth to Venus, or "Zarovia," where the man of Mars becomes Prince Zinlo of the mighty empire of Olba. Zinlo is instructed by Morgan's fellow-scientist...