Here's a review that gave the book one star:
We've got a kid who lives near the Grand Canyon but his father is assigned to Luke Air Force base. If you look at the area around Bright Angel, none of the locations written in the book would realistically happen here but assuming they did, this dad would have a FOUR HOUR DRIVE to work. If you put the location down closer to Flagstaff you couldn't have kids riding their bikes to the Grand Canyon AND you'd still have a 3 hour commute. How hard would it have been to research out a plausible location for the book and it's characters?
The only reason that family was written about as such is because Mr. Gutman had a political agenda. The unfortunate thing is that he didn't even get it right. It smacks of unintelligent and poorly researched opinion delivered to children as fact. That is irresponsible. Kids will have opinions about important events, like the war and that's fine. But you must give them the correct facts.
The other thing that bothered me to no end was the Milner guy. He is introduced as having tracked these kids down almost magically and knowing everything about the kids. That plot line went nowhere and made no sense at all. The fact that Gutman just passed him off as some marketing dude was a poor payoff with no resolution of the actions previously in the book.
As far as the red button staying on despite the lack of electricity running to the computer? Random inference of artificial intelligence run amok.
This was a totally ill-conceived and poorly researched book with no follow-through on some of the most major issues. I'm very disappointed with the fanfare this book has received.