I wanted to love this, and I really, really tried: The title! The cover! The premise! But alas, no.
There's a new (male) school librarian, and he's got Cyn's best friend Annie seeing stars and hearts and K-I-S-S-I-N-G in her daydreams. And while that could be creepy in an inappropriate-student-teacher way, it's actually much, much worse ... because he's actually a demon come to suck the souls of hapless teenagers for power and he wants Annie as his human consort.
That would be drama enough for most teen novels, but this one goes further to add another layer: actual drama in the form of a school production of "Sweeney Todd." Cyn's all tied up in knots trying to rig a barber's chair for the production that's dramatic and scary and perfect.
The novel's too slow - there's a lot a lot of wringing of hands about the fact the big evil showdown is coming right after showtime (because apparently demons love Sweeney Todd and the battle can wait until after they've seen this production). But that's 10 days away! And then, that's 7 whole days away! Oh no! In any event, it's too far away.
I persevered for the sake of saying I did, but I'm not sure I can recommend it for anyone over 17; teens may be slightly more in-tune with the loves-me-loves-me-not substory than I was.