Rob and Allie are a fun pair to read about. I laughed at some of their more ridiculous romantic moments such as the fact that he would drive by every night and became a "stalker" in the eyes of her mom.
I enjoyed reading about XP and the fact that they basically did live a life in darkness, fearing the sun and hoping to live. It made me think about it a lot and I am curious about people that are essentially creatures of the night because they have to live in shadows.
The mystery and thriller aspect of the story was fun to read and kept me on my toes throughout the course of the story. Sometimes you question whether Allie saw what she thought she saw or whether there is some big cover up going on. It keeps the story interesting and intriguing.