There's some good moments here, and an interesting premise, but a lot of the writing (particularly the dialogue) is extremely clunky. Lucas comes across as criminally stupid as a result and I had no idea why Juliet was into him. Characters are either totally undeveloped or one dimensional, except for Juliet, who is the best thing about this book. The bad guy is relentlessly bad, and it's not really explored WHY (view spoiler)[the silos aren't allowed to know about each other, or why it's such a big secret that humans destroyed the planet (hide spoiler)] so the impact of learning those "secrets" is lessened. The text really needed an editor. There are endless descriptions that add nothing to the tone or mood of the book.