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 & is transported millions of years into the past to a Mars peopled with mighty warriors beautiful women & fearsome beasts Sheb Takkor a great swordsman in his own right must fight his way across the deserts & jungles of ancient Mars to save the lovely Princess Thane & to defeat his arch-enemy Sel Han
- or die trying! Edgar Rice Burroughs was the first great writer of planetary adventures His one true rival & equal at writing planet stories was Otis Adelbert Kline Kline was on the original editorial staff of Weird Tales & was literary agent to Robert E Howard of Conan fame