Reviewers were happy to see a fresh take on a well-worn subject of sci-fi and horror stories: demonic possession. They suggested that by creating a world where demons are commonplace, Gregory has in fact found a way of making the subject novel. Critics were even more impressed by Pandemonium’s well-developed characters. As one reviewer noted, the possessions of the story affect the trajectories of the characters’ lives in the same way as mental illness, without transforming this novel into an allegory. The book includes many insider references to other sci-fi works, which may turn off some readers; however, the critics concluded that while Gregory may occasionally channel the spirits of A. E. van Vogt and Philip K. Dick, his voice is strong enough to speak for itself. Copyright 2008 Bookmarks Publishing LLC