Like all of John Norman’s Gor novels, Priest-Kings of Gor is a rehash of Edgar Rice Burroughs more enjoyable Barsoom novels, except with some super uncomfortable ideas about the role of women and some crude and unsuccessful stabs at eroticism.
No, I can’t justify having read this book, except to say that, when I was much younger and prowling used bookstores, this series was ever present on the sci-fi/fantasy shelves.
The protagonist visit the home of Gor’s unseen rulers and learns that they are a race of intergalactic spiders who communicate by scent (I’ll say this much, Norman does a good job of describing and explaining this). He sort of forgets that they destroyed his city and scattered its citizens, including his ‘Free Companion’ (sort of like a wife), to places unknown and becomes friends with the spiders and… well, it’s exciting enough, but you’re better off just reading A Princess of Mars.
Just as a note, there is, apparently, a small Gorean subculture who participate in Norman’s deeply awful ideas of gender roles and sex, which mostly involves a belief on his part that women really want to be ruled by men and to call them master. It’s sort of like someone took an occasional, kinky date night idea and decided to do it every day and not just when the kids are asleep. It’s so weird. It also means that every female character is incredibly shallow and two dimensional.