Over all a pretty good book. I loved the supernatural spin that this book had, the shifters witches angels and demons, perfect for a Halloween vibe. I really enjoyed Violet and Lincoln but they were so incredibly dense.  
The biggest issue I had with this book was the flow of the information, it started off so heavy with who is who and different aspect of the supernatural community I couldn't keep up and had to keep rereading to understand everything. The beginning wasn't the only time information overload happened but it was easier to keep up later in the book.