If your kids liked the first
Maximum Ride, then they'll like this one too. How can we be so sure? Because it's exactly the same. This series has been compared to a thrill ride, a roller coaster. As with a roller coaster, the reader gets lots of thrills, excitement, scares, tension, and fun -- but it's all artificial, meaningless, and you end up right back where you started, with nothing accomplished. It's an empty thrill.
By the end of the book, the main characters have been attacked, injured, healed, are captured, escape, captured, escape, etc. But they've gotten nowhere. This appears to be a trilogy with no actual narrative arc. Exciting stuff happens, for no discernible reason, and what little actual story there is makes no sense at all. It's a mere contrivance, the struts that hold up the ride -- you're not supposed to pay attention to them. You're just supposed to surrender to the ride. There's something horribly cynical about all this. It's harmless fun, one supposes, but it is possible to write a fun story and still respect the intelligence of your audience.