I walked into a bar...and he saw the end

Recently I read a novel that annoyed me no end with its capricious disregard of its own genre rules. And I worry that in it, I saw the end of the current boom of fantasy/paranormal novels crossed with the hardboiled detective form, which depresses me because hey, I write that kind of book.

The novel (unidentified here because it's symptomatic of something larger) is told in first person by a detective figure who battles unseen paranormal creatures all around us. He's tough, world-weary and d...