At times this book was definitely interesting and exciting, but at other times (most times) it was dull, irritating, and pointless to the story as a whole. This story had potential, and it could have been much better if the writing was up to par. For example, there was an excessive use of "Me too[s]" and "Our eyes locked". Also, many scenes (sometimes three pages long) were told instead of shown. 
 Almost all the characters in this book, excluding Henri ((view spoiler)[who gets killed off for no reason (hide spoiler)]), Sam, Number Six, and Bernie Kosar (yes, the "dog"), had no common sense and were unbelievably stupid at times. The main character is boring, unintelligent (even though he assures us he's smart), and annoying, but at times (not many) he proves to be an interesting character. The relationship between John and Sarah was so irritating I started to feel nauseous just reading it, and while I was reading I hoped the Mogadorians would come along and kill them just to end my torture. As a whole, I really liked the idea of this story, but the way it was delivered didn't do it justice.