The new Planet Stories edition of The Swordsman of Mars contains an introduction by Michael Moorcock.
In The 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 fearsome beasts. Sheb Takkor, a great swordsman in
his own right, must fight his way across the deserts and jungles of
ancient Mars to save the lovely Princess Thane and 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 and equal at
writing planet stories was Otis Adelbert Kline. Kline was on the
original editorial staff of Weird Tales, and was literary agent to
Robert E. Howard of Conan fame.