The book starts off with a bang, grabbing the reader immediately. The premise sounds interesting, and I love the Paris setting. I'm not sure I've ever read a book that involves catacombs. I like the multiple POVs. It seems to have a bit of something for just about every reader: romance, paranormal, and thriller. However, young adult books aren't my go-to, so I'm not sure that I'm the audience for this one.