Okay I was about to start a thread on this book, but good I found this.
Finished the second volume. This is utterly fantastic. I always liked Mike Carey's work on X-Men and Lucifer, but this may be the best thing he's done, at least IMO. I'm also glad it's easy to follow even if you're not a literary expert.
Also, Peter Gross's layouts are fantastic.
Just incredible stuff. Might be my favorite book in comics now.