I just finished Maximum Ride- Schools Out-forever. Its a great read, 407 pgs. long. Its sencond in the first series out of four. You definitely want to read in context.
I would give it 5 stars because it gives the characters depth, has action, and really funny. Its about a group of kids with wings given to them by phsyco scientists. They escape, but the scientists hunt the kids down, but never really catch them. They call themselves the flock.
The author, James Patterson is amazing. He writes great books, but the Maximum Ride series is his best. I recommend these books a lot.