Summary from Amazon.com:
Finn is a mysterious guy who always seems to be watching her. Every encounter leaves her deeply shaken…though it has more to do with her fierce attraction to him than she’d ever admit. But it isn’t long before he reveals the truth: Wendy is a changeling who was switched at birth—and he’s come to take her home.
Now Wendy’s about to journey to a magical world she never knew existed, one that’s both beautiful and frightening. And where she must leave her old life behind to discover who she’s meant to become…
This book was really great. I haven't read any books about trolls. Sorry I mean Trylle (not trolls, trylle). I really liked the plot of the story and the characters. What I really liked about Wendy was that (SPOILER) she treated everyone how she wanted to treat them even though she was the princess. She was friends with Rhys even though she was told she can't be, because she is the princess. I loved how Finn would just share at her at the beginning of the book. It made you wonder what he knew and what it had to do with Wendy. There was always something interesting going on, never once was there a boring scene!