Supernatural AND a private detective element? Sign me up!

Supernatural AND a private detective element? Sign me up! These are the type of escapist books I love. The private detective has a twin sister who's a teacher in a magic school, and there's been a murder. Really, what else do you need by way of description. I do not like the cover. Eyeballs in weird places creep me out. I would love this book, so I'm using my points to claim it!