4 to 3.5 stars - Surprisingly slow with way too much of the focus on Sam's woe-is-me angst. Plot could have been... redirected to make it less painfully tedious. Oh, and Isabel? While tolerable for most of the book, made me want to set her one fire with her later actions.
The only saving grace? COLE. He was the only bloody character in this book to DO anything, and yet everyone just ragged on him for being a menace. Basically, he was the Tony Stark of the novel: Genius, Rock Star, Playboy, Philanthropist and NOT LETTING HIS ANGST INTERFERE WITH SCIENCE. Thank God almighty I read this with Sinner already on my shelf.