Robert Grandon Series by Otis Adelbert Kline

Derring-do on a world of primitive monsters! When Robert Grandon swapped bodies with a prince of the planet Venus, he was concerned only with the thrill and interest of living on a different world. But the situation he found himself in was hardly that of a leisurely sightseer. Instead, he found himself smack in the center of a whirlwind of intrigue, danger, and desperation... moreDerring-do on a world of primitive monsters! When Robert Grandon swapped bodies with a prince of the planet Venus, he was concerned only with the thrill and interest of living on a different world. But the situation he found himself in was hardly that of a leisurely sightseer. Instead, he found himself smack in the center of a whirlwind of intrigue, danger, and desperation.Planet of Peril is a science-fiction adventure on a world of semi-barbaric nations, ferocious beasts, gigantic reptiles, and maidens in distress! less

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 Vorn Vangal in the universal language of Venus and other skills. An attempt to kidnap Zinlo by Taliboz, a secret foe of the empire, forces him to flee in an Olban airship... moreThrough 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 Vorn Vangal in the universal language of Venus and other skills. An attempt to kidnap Zinlo by Taliboz, a secret foe of the empire, forces him to flee in an Olban airship. He crashes in the empire of Adonijar, where his quarrel with Prince Gadrimel over the Princess Loralie of Tyrhana is interrupted by Taliboz, who seizes the girl. Zinlo and Gadrimel pursue Taliboz, and many thrilling adventures are encountered by Prince Zinlo. less

Grandon embarks on a perilous search for a missing royal daughter and a port filled with pirates. This is the 3rd book in the Planet of Peril series.excerpt"""Have you any idea where to look for this hidden port?"" asked Grandon.""We have no definite knowledge of its location, but the belief that it lies to the south has arisen from the fact that pirate fleets, leaving a scene of pillage, have almost invariably been observed to sail southward... moreGrandon embarks on a perilous search for a missing royal daughter and a port filled with pirates. This is the 3rd book in the Planet of Peril series.excerpt"""Have you any idea where to look for this hidden port?"" asked Grandon.""We have no definite knowledge of its location, but the belief that it lies to the south has arisen from the fact that pirate fleets, leaving a scene of pillage, have almost invariably been observed to sail southward.""""I believe my flyers can locate it,"" said Zinlo, toying with his kova cup.""It's a big world,"" boomed the gruff Aardvan, ""and it will take a deal of flying, sailing, and marching to explore it all.""""Perhaps Mernerum will help us,"" suggested Ad.""I take it,"" replied Grandon, ""that you are unaware of the strained, or rather severed relations between Mernerum and Reabon. This morning I ordered diplomatic relations severed with Zanaloth of Mernerum, because of his affront to my wife when she passed through his dominions some time ago.""""We can do well enough without that dissolute old rake,"" said Zinlo. ""But we're keeping you from that honeymoon trip, Grandon. I understand that your expedition was ready to march when Ad and Aardvan arrived.""""We'll give it up,"" Grandon assured them. ""I'm sure Vernia won't mind for such, a worthy cause.""""See here,"" Ad protested. “We don't want any such sacrifice. Allow us to take a few of your ships for the present, and perhaps some warriors and munitions in case a landing party is required. Go on your honeymoon. Later, when we've discovered the port of peril, we'll notify you, and let you in at the kill.""""But your daughter has been stolen. Every man on this planet, worthy of the name, should be willing to assist in the search."" less

A short interplanetary romance set on Kline's Venus. Available at project Gutenberg Australia. First published in Amazing Stories December 1933.