This is the second book in the Ender's Game series, and is better than the novelized Ender's Game, although it is impossible to beat the short story version. Ender has grown a lot over the time between this book and the last, and the story is compelling and believable. I really enjoyed this book.
I've read this book before, many years ago. I figured I should re-read it, given how much I love the short story. Unfortunately, I think the short story is better than the novelization. The novel tends to try to explain too much, although the last chapter is a worthy addition. I'm sure I'll still read the rest in the series though, as there is more to see in this universe.