The first book in the 5 volume Demon Princes saga. The protagonist's parents were murdered by a posse of 5 galactic criminals, the "demon princes". He vows revenge, and eliminates them one by one. In the process Vance does what he excels at: creating strange worlds, environments, customs, and adaptations that humans have made to live in these conditions.

Having brought arch-villain Malagate the Woe to justice, Gersen now sets his sights on Kokor Hekkus, another of the Demon Princes. The name Kokor Hekkus, which means "killing machine" in the language of the planet Thamber, does not refer to Hekkus' own predilection for homicide, but to his fondness for horrific and murderous devices, including the giant robotic executioner that first gained him his nickname. The Killing Machine is part 2 of 5 of The Demon Princes Series. The Demon Princes is a five-book series of science fiction novels by Jack Vance, which cumulatively relate the story of one Kirth Gersen as he exacts his revenge on five notorious criminals, collectively known as the Demon Princes, who carried his village off into slavery during his childhood. Each novel deals with his pursuit of one of the five Princes.

Very good condition, pages yellow from age

Kirth Gersen tracks Lens Larque across several worlds, most notably Aloysius, the desert world Dar Sai and the more temperate Methel. He eventually learns that Larque is a Darsh, born Husse Bugold. He had been deprived of an earlobe and made a rachepol or outcast from his clan for a crime considered "repulsive but not superlatively heinous." He took the name Lens Larque, after the lanslarke, an indigenous creature and the fetish of the Bugold clan. (It was this slim clue that enabled Gersen to track him down.) He then became a notorious criminal renowned for his magnificent, if often grotesque and horrifying, jests.

Kirth Gersen pursues the last of the five Demon Princes he has sworn vengeance against, Howard Alan Treesong, a cruel tyrant fond of terrible jokes