I'm not sure how I feel about this book. On the one hand, it has an almost juvenile feel, especially in the descriptions of the aliens and their illustrations, as if a tween wrote it. On the other hand, the writing is more polished and mature and that juvenile feel gives a very authentic voice to the 14-year-old narrator. I didn't find it as funny as some reviews said it was, but the author manages to describe an older teen girl/younger teen boy working together realistically and it really works in the story. But parts of the plot feel kinda pedestrian, especially the evil guy behind the scenes. The idea of frequencies is similar to Diana Wynne Jones' parallel worlds in the Chrestomanci universe, but Feig's evolution makes this a new and interesting fantasy concept.
Verdict: Hmmm. Obviously, it was interesting enough to read all the way through and has enough depth to keep me thinking about whether or not I liked it. So, thumbs up! An additional purchase if you'd like something a little different
ISBN: 0316166634; Published September 2008 by Little, Brown; Borrowed from the library