Quite engrossing, even if the characters are rather two-dimensional. My favourite's the deux ex machina man, which readers will recognize immediately. Stephen King used to have one like that too, and (view spoiler)[he always died too. Usually named Nick. (hide spoiler)]. Nice monsters, nice historical tie-ups. Wish it weren't those baddies, how boring, but as villains they serve. 
 Anyway, reading The Fold now as I want to know more about the House of Mystery.