Good Omens – Neil Gaiman and Terry Pratchett.
I enjoyed this. Well-written, absurd, silly fun. As a literary junk-food item, I’d say this is well-made gourmet peanut brittle.
The Snake’s name is Aleister Crawley, or something like that.
Sorry, I read this months ago and don’t remember too many details now.
Did I overlook your review? Let me know in a comment, and I will add the link here.