Deathworld 2 by Harry Harrison

This Halcyon Classics ebook is DEATHWORLD 2 by eminent science fiction writer Harry Harrison. In DEATHWORLD 2 (originally published as THE ETHICAL ENGINEER), Jason DinAlt finds himself on a hostile, barbarian planet where technology and civilization have almost disappeared. Using his skills, DinAlt literally reinvents the wheel in his quest to escape and return to his friends on Pyrrus.