It served as an excellent exercise in what one can learn from examining both sides of a disagreement. A surprise thumbs-up.
It's urban-fantasy-meets-old-fashioned-private-eye-noir, kind of a cool combination. Green is a little too smug and self-aware to be really good though; the protagonist is supposed to be tough and dangerous but he usually just comes off as a poser.
The author uses too many superlatives, like Pratchett but worse. Every other character is the baddest, deadliest, evilest thing to ever walk the Nightside. It gets old.
But it's not a bad book; I found it to be a fast-paced and fairly amusing. It's just that it doesn't live up to it's potential.
Unfortunately "Something from the Nightside" is also very self-conscious. Literally every other page contains the sentence "[Something bleak and ominous], in the Nightside." Green reminds the reader of how "other" his creation is, ad nauseum. I get it, the Nightside is ultra-dangerous, and the hero is proportionally amazing; stop treating me like I'm stupid.
But in spite of the distractions and occasional insults to my intelligence, I found it to be a fast and fun story. I'm looking forward to the next book.
It's fascinating to watch all these newly-intelligent creatures begin to ask themselves great philosophical questions: where did we come from? why are we here? what happens to us after we die? is there a Great Rat Under the Ground? Really great stuff.
Midnight Mass is not beautifully written, but it's not bad. Its strength lies in its story and its strong internal logic. If vampires were real, this is how their world would look. It's extremely dark; Wilson spares the reader nothing at all. It can be very hard to read sometimes, but I love this book for its unwillingness to compromise.