The novel “The Weapon from Beyond” by Edmond Moore Hamilton was published for the first time in 1967. It’s the first book of the Starwolf trilogy.

Morgan Chane is a Starwolf who grew up on Varna, a high-gravity planet whose inhabitants develop a great strength, but he’s of terrestrial origin. In a brawl he kills another Starwolf and at that point he gets hunted by his former comrades, who want to kill him. Wounded, he can only hope for the help of the first spacecraft passing by but it has a crew of mercenaries.