From the summary, I wasn't expecting an X-Men type theme, but how much better would this book had been if it was more X-Men and less Twilight? The answer is: a lot. 
 I didn't like Kat, although I give Pierce props for making her sound like a seventeen year old and not a twelve year old. Actually, I didn't dislike Kat, mostly because she was so bland. Everyone was bland. It was terrible. 
 There's your typical YA love triangle but not really a love triangle. Levi and Gabe are... nice, but that's about it. Like I said, bland. 
 The first part of the book, with gifted teenagers and a huge school, could have been a lot cooler than what we were given. But, much like the characters, the world is flat and - you guessed it - bland. 
 Enter the Twilight knockoffs (because really, seven mysterious people + one bonus one, all of whom are coupled except for the object of affection for our heroine? I'm sorry, it's pulled straight from Twilight) who want Kat to live with them in their little travelling band of misfits. And of course, she starts seriously contemplating it after a night of making doe eyes at Gabe. Gag. 
 The villain? Too obvious. (view spoiler)["Hey, why do the thirty-something couple look older than eighteen if that's the age cap for angels?" 
 "We don't really know why." 
 Yeah, come on! Carlisle and Esme, I mean... oh I forget their names, so whatever, they were obviously the bad guys. And the Twilight clique fall right into their trap. (hide spoiler)] 
 After the big climax of the story, the wrap up was way too long and it dragged out so much that my eyes rolled into the back of my head. All so they can go to a high school dance? So Levi and Gabe can become friends and not duel over Kat (seriously awkward scene, by the by)? I don't know, and I don't think I care all that much either. 
 This book was short, free, and not really entertaining. Cannot recommend.