Good one. Play with the birth of the son of Satan. It is good story telling with the subplots that when Satan team members live in a human world, they turned human themselves.
Read it a long time ago and forgotten a lot of details.
It is curious that I was a fan of Terry Pratchett before I was a fan of Neil Gaiman.
Personal note aside, this is a good book to read and reread. Keep this with you just in case you are left alone on a family trip with nothing good to read. Definitely a good read on plane book or pool side book.
The cover art is no good, but that's is its only thing I don't like about this one.