Otis Adelbert Kline Books in Order

Robert Grandon exchanges bodies with a prince on Venus, expecting the excitement of another world. He instead encounters political intrigue, dangerous creatures, and oppression, becoming involved in conflicts that demand far more than a visitor's curiosity.

Dr. Morgan's experiments transport a Martian consciousness through Earth to Venus, where he becomes Prince Zinlo. A kidnapping attempt and rival princes draw him into aerial escapes and a pursuit involving Princess Loralie and a hidden enemy.

Raised in captivity by a scientist with a chimpanzee as his companion, Jan knows little of human society. Escape brings him into a dangerous jungle world, where his upbringing and encounters with Ramona challenge his understanding of himself.

Seeking a new life, Jerry Morgan travels to Mars and immediately antagonizes a princess by killing her pet. Entangled in court politics, he must navigate manipulation, dangerous rivals, and adventures on an unfamiliar, canal-crossed world.

Having lost his business and relationship, Harry Thorne accepts a chance to exchange places with a man on ancient Mars. The transfer offers a fresh start amid warriors and extraordinary creatures, but survival demands unfamiliar skills.

A yacht voyage turns disastrous when Jan is cast into shark-infested waters and his fiancée Ramona is abducted. His pursuit takes him into India, where rescuing her requires confronting a maharaja and further threats to her life.

Hamed the Dragoman recounts adventures of romance, changing fortunes, and confrontations with powerful rulers. This collection follows his dangerous exploits, including a wrongful murder accusation, through stories shaped by travel, storytelling, and repeated encounters with peril.

A writer accompanies a professor studying Arizona’s Crater Mound, where both men struggle with unanswered questions. Their investigation leads toward the origins of humanity, testing the scientist’s insistence on evidence against the possibilities his imaginative companion can entertain.

An unemployed climber answers an advertisement promising easy work and excellent pay. His meeting with Professor Hartwell draws him into a strange scientific undertaking involving the elixir of life, offering hope while raising questions about its true cost.

A million-dollar competition rewards the creator of the most convincing automaton. Against the promise of scientific progress, an apparently inexplicable suicide and a return from death complicate the contest, exposing dangers behind humanity’s efforts to manufacture life.

Volcanic eruptions release unfamiliar monsters onto Earth, turning geological upheaval into a threat from creatures previously hidden from humanity. This science-fiction adventure explores the dangers that emerge when violent changes in the natural world reveal something unexpected.

Doris Lee is kidnapped and taken to a hidden city beneath Chicago, where a ruler calling himself Osiris intends to marry her. Two rescuers enter the underground kingdom, only to face captivity and a ritual death themselves.

The mysterious death of a scientist draws Dr. Dorp into an investigation of experiments intended to create life. Strange evidence in the laboratory raises the possibility that scientific achievement has produced a lethal organism beyond familiar experience.

Inventor Ted Dustin fires a projectile at the Moon to win a prize, only to provoke a retaliatory attack. His attempts at communication reveal inhabitants embroiled in conflict, turning an experiment into an interplanetary crisis.

Spacecraft enter Earth’s atmosphere like falling meteors, bringing death to anyone who resists their arrival. With the planet’s future at stake, Hammond must confront the invaders while imprisoned, his hands bound and his ability to intervene severely limited.

When Venusian pirates abduct Robert Grandon's wife Vernia, he pursues them toward their hidden port. The search draws him into alliances and further conflict with raiders whose overwhelming attacks endanger nations throughout his adopted world.

An expedition into unfamiliar jungle terrain encounters a terrifying presence moving through the rain. Isolation and the mysteries of the surrounding wilderness turn exploration into a struggle against the unknown, blending adventure with the threat of something beyond ordinary understanding.

Three pulp tales bring together supernatural horror and historical adventure. Alongside the unsettling Thing of a Thousand Shapes, Hamed the Attar faces dangerous encounters in The Dragoman’s Secret and The Dragoman’s Confession, where survival depends on overcoming powerful enemies.