This is a very interesting and exciting story. The main character manages to live two different lives at the same time, not always successfully. Her college courses suffer due to her shift when the sun goes down, and her love life suffers because she can only see Magnus at night. She has to keep both lives separate and secret from the other. The author does a good job creating and describing the two worlds, and I really like the Cassandra character. The plot is surprisingly easy to follow despite the two worlds and numerous characters. The author could have done a little more research on the Roman Catholic religion; making one of its priests a married father is a pretty glaring error. I will definitely be checking out the first book in this series as well.