** spoiler alert ** 
 Bell Bridge Books provided me with a free copy of this book for review purposes. 
 Allie just found out she has a twin sister, and that the twin is necessary to her mission to save the world from Trimarks. So she goes searching for her twin, aided by Junior a new friend. But instead, she gets captured, nearly killed, and discovers that her twin isn't the girl who will help her. 
 The second and third books in this series were a bit slumpy, but this one picked back up and fixed a few of the issues that I had with the other books. So I'm trying something new with this review: I'll show you the issue I had, then how this book fixed it. 
 I'm not sure I like that the Trimarks are Born to Be Evil and the Star Seekers are Born to Be Good. In this book, we discover that the Trimarks are actually part Unseelie faery. THAT I can live with. They're not entirely people, and the part that isn't people is traditionally evil. I wish we'd learned this earlier. 
 I found the excuse for getting rid of Junior--he's been cast in a Mexican soap opera! As one does--kind of flimsy and Allie's quick, almost eager, bounce to Beck as her love interest rather jarring and sudden. I'm still a bit grouchy about the way Allie bounces from guy to guy in each book, but at least this time she bounces back to Junior. And his fame and money do help out quite a bit in this book. 
 The entire Faerie (or, as it's called here, Boundless) episode was a radical tonal shift for the books, which have for the most part been pretty down-to-earth (as down to earth as an urban fantasy novel can be). I'm growing to like the faerie aspect better, mostly because it explains a lot, though I think the less time Allie spends in Boundless, the better. 
 [Allie's guardian angel]seemed like a useless piece of plot that could easily have been left out. I stand by this one. She pops up again (for the last time, apparently) in this book, but doesn't really add anything; Allie already knows everything she has to tell her. 
 Generally, I wish the faerie thing had been included earlier, possibly even in the first book. Throwing it in as late as the third one was a bit head-spinning, and it took me a few chapters into the fourth book to get my feet back under me. The pacing of all four novels is a bit slow at first, then flies into breakneck speed through the last few chapters; I think that could have been a bit better. 
 I'm glad the fourth book picked back up after the slumpiness of the second and third ones, and I bet the next few books continue to get better.