Lock and Key: Book 1 of the Nocturne Academy Series

What do a mysterious necklace, forbidden Blood Magic rituals, and a sarcastic Nocturne boy with the face of a fallen angel all have in common?
Me, apparently.

Since I started school at Nocturne Academy, strange happenings have befallen me. The weird key-shaped necklace I found at a flea market chokes me every time I try to take it off. Also, a tall, beautiful, and bitingly sarcastic Nocturne has the lock that matches it.

His name is Griffin Darkheart, and—like this freaking necklace—I can't seem to stay away from him, though he's being Censured for mysterious crimes. Among a student body composed of vampires, witches, were-dragons, and fairies, I no longer know what my future holds.

To heck with graduating with honors. I'm just hoping to graduate alive. Nocturne Academy is full of deadly dangers.
And I've already got a target on my back...