This was the first book in a series and it showed. It seemed to be all over the place, jumping back and forth. Too many couples/stories to follow. I really wanted to know Coop and Sarah. It would have been nice to do without so many of the side characters. I realize following books will probably focus on these side characters, but I feel like I've already read half of their stories and Coop and Sarah's story wasn't quite finished. I did like the book, just felt a bit overwhelmed with all the story lines at times. If it would have been less complex it would've really hooked me.