This book was deliciously creepy. I can't believe this hasn't come on my radar sooner but I'm so glad it did and I read it! Jump scary parts, sarcastic quips and pop culture references, a kickass hero named Cas, that reminded me of teenage Dean in Supernatural, a vengefully pretty sixteen year old ghost who's been killing for 60 years. So many good elements to this. It wasn't perfectly written but it was pretty damn cool.