I liked most of this. The characters are engaging, the angel and demon are fantastic, the plot is pretty well paced, and most of the humor is spot on. However, it has threads of homophobia wound throughout the book, despite the character in question canonically being "sexless". A lot of the homophobic jokes are made by characters we're meant to dislike, but it disrupted my enjoyment of an otherwise great story.

If you're looking to the book to see if you'd like the show, the homophobia and pacing issues are some of the things that the show fixed, and I recommend you just watch that instead of trying to read the original material.