I should state from the begining I am a Van Vogt fan. In saying this I also acknowledge that some of his works are complete trash, but when he's good he's hot! As far as his later works go if you liked Tyranopolis, Cosmic Encounter and Quest for the Future then you will like this. This novel combines an excellent mixture of SF, detective, mystery and whodunnit. You follow Alison Stephens as he deals with cults, murders, people from the past and one strange would-be-girl friend, (he hopes). As is usual in most Van Vogt novels there are numerous twists and turns throughout the plot to keep you interested and on your toes. Do yourself a favour - Get it!