My full review is here on my personal website. I'll post a few excerpts here, though:

4.5 out of 5.0 stars

The very worst thing about this book is why Allie can skinjack. It’s not that it’s a bad plot point, or anything, it’s just really sad. :-(

The very best thing about this book is the reason skinjackers can skinjack. It’s genius! I won’t give it away, but it takes a sincerely twisted mind to come up with such an amazing detail. ^_^