I meant to get this book free through Amazon Prime's Kindle borrowing service, but accidentally bought it for $5. Oh well, lesson learned. This book has terrible writing, but was tough to put down. I haven't figured out how a crappy book could be that enjoyable, but it is what it is. I guess the premise, which seems less like a rip off of The Running Man than thought, appeals to me. I can certainly see how the tweens got wrapped up in it.
There is a fair amount of casual violence which seems like a bit much for younger readers, but they're already exposed to violence in other media.
I recommend this book if you can get it for free.