Archie has some serious phobia associated with commitment and a chunk of the book is devoted to finding out what it is and whether it is reality based (remember, this is a book in which Hell is the Regional Office and Heaven is the Home Office). It is, sort of, and not, sort of. Stevenson has some fun with magic and metaphor. Also with chocolate.
I like Stevenson's books; she's got a seriously weird sense of humor and is willing to play out a premise with vigor, which I always admire. The secondary romance involves another Slacker/Sex Demon, who turns out to be closeted two different ways, and when he comes out of his closets, he discovers that his past and his present and future are very, very, very tiny worlds. I'm not sure how I feel about that.