This is a paranormal/supernatural romance for teens that reads (somewhat) like Twilight. In fact, liked it more than Twilight. The characters take turns narrating the chapters so you get to hear both sides of the story. I totally fell in love with Sam during those chapters he narrated. He is so much cuter and more considerate than Jacob OR Edward. He feels protective of Grace ever since he saved her life and feels a connection to her.
In addition to the romance, there is a sense of a mystery. The beginnings of the werewolf disease (is it a disease?) is completely unknown. Why Grace never changed is unknown. How much time Sam has left is unknown. Everything is on the edge. It all comes down to these few weeks that we, as readers, are privy to. It could go either way. Maggie creates a anxious tone as these two star crossed lovers are desperate for time together.
I also really enjoyed the werewolf-lore. It was interesting and not the traditional switch back and forth business. It was a really interesting take the traditional stories--somehow it made more sense to me than at every full moon there are all these half man/half beast creatures running around under the guise of fur. Why have we never seen some kind of half beast walking around, drinking a Pepsi, and howling at the moon? It just doesn't make sense. But the way Maggie has her characters change is brilliant!
I totally want to read the next book