In the interest of full disclosure, let me mention that I'm friends with the author of this book. Until about 16 months ago, we were part of the same online writing group, and I've helped critique other works in progress (not this one). However, I don't think that skewed my opinion of this work at all. 
 Isabel is a Shifter, a magical creature created to protect the kings of Samorna. But something happened years ago, and she fled back to her home, Mistwood, until Crown Prince Rokan, days away from becoming king, comes to find her and re-recruit her to guard him. Without her memory of what happened the day she left, Isabel must work her way through intrigues, secrets, and her inexplicable inability to use her Shifter powers in order to decide who to trust . . . and who to protect. 
 This was a fascinating book. Cypess does not skimp on the surprises or twists, and every time I thought I had the situation figured out, she'd throw in something new that kept me guessing. The characterizations and pacing were wonderfully constructed; at no point did I think the story was moving too fast or too slow, or that the characters were acting oddly (other than when they were supposed to be, of course). Also, although this is a YA novel, it did not talk down to its audience through simplified language or ideas. It's one of the best books I've read in a long time.