•
Star King (1964). The first target of Gersen's revenge is Attel Malagate, a renegade from a species called the Star Kings. The Star Kings can consciously evolve themselves and are driven to imitate and surpass the most successful species they encounter. With their contact with humanity, they begin making themselves into imitations of human beings. Gersen lures Malagate within reach with an undeveloped and fantastically beautiful planet whose location is known only to Gersen. Malagate covets the planet as the home of a new race—to be fathered by it—that can outdo both humans and his own species. •
The Killing Machine (1964). Gersen discovers that Kokor Hekkus has prolonged his life by the
vivisection of human beings to obtain hormones and other substances from their living bodies. Not content with living just one life, Kokor Hekkus uses the lost planet Thamber as a stage where he can act out his fantasies under a variety of identities. •
The Palace of Love (1967). Viole Falushe is so obsessed with a girl from his youth that he created a number of
clones of her in a vain attempt to psychologically manipulate one into returning his love. Gersen, disguised as a journalist, travels to a planet where the Demon Prince has built an entire civilization acknowledging him as its supreme ruler. •
The Face (1979). Gersen pursues Lens Larque, a sadist and monumental trickster, to various planets. He uncovers Larque's most grandiose jest, revenge for a slight. •
The Book of Dreams (1981). Gersen foils several schemes by Howard Alan Treesong, already the head of the underworld across the human regions of the galaxy, to take over the most powerful of humanity's organizations. ==Publication history==