Currently I #amreading Arena of Antares, by Kenneth Bulmer writing as Alan Burt Akers. It is book 7 in the Dray Prescot series, which first saw publication in 1972 and runs through 53 volumes, though the last several have only appeared in German.
Like the John Carter stories of Edgar Rice Burroughs, the Dray Prescot series belongs to the “sword and planet” subgenre of science fiction and they are similar in many ways. Inconceivable forces hurl a mighty Earthman to a new world more savage than the one of his birth, catapulting him into the middle of rugged adventure. He hits things with swords, leaps from burning airships, arm-wrestles creatures who have more limbs than is proper, and resists the alluring charms of mysterious women–sometimes all at once.
Mike Schulenberg 