This book is one of my all-time favorites. It's about children in Battle School preparing for the next alien attack on Earth. Card's characters are great, very real. I usually reread this at least once a year and I'm never disappointed with it.
I just reread this book and it's probably better than I remember it. Normally I would take off a point for the fact that the characters are clearly too young for their actions but, hey, it's fiction.
I was completley wowed over by this book. I would say it was the best book I read in all of 2002. If you are a fan of scifi then you must read this book. You won't be able to put it down.