I’ve been struggling to find something to say about Pandemonium beyond “I really enjoyed it” that doesn’t involve too much in the way of spoilers. Probably the best I can do is point you to Mike Berry’s review in the Chronicle and add that Gregory definitely has his finger on the pulse of the genre world. The idea of having demons based on popular culture archetypes such as Casey Jones, Dennis the Menace and Captain America is just too delicious. And then there’s the sequence set in the demon fan convention featuring Phil Dick (who is possessed by a demon called VALIS) and Tim and Serena Powers. Lovely stuff.