In The Quillian Sector, Dumarest finds himself in the titular neighborhood in space - supposedly known for its many unpredictable factors. Those factors don't really play into the story much, though. In it, the Cyclan (cyborgs who are after Dumarest cause he knows some of their secrets) have hired a famous and cruel hunter to find Dumarest. Meanwhile, Dumarest has found work as a gambling manager on a passenger ship. Of course, yet another lovely woman, this one the ship's engineer, finds herself besotted with Dumarest.