I can't encourage you enough to read this book. Then read Speaker for the Dead and then the whole rest of the series. Then you get to start again through the events of Book 1 from a different character's point of view in Ender's Shadow. Every one of them engrossing, mind-expanding, ethically challenging and magical: the zero gravity chamber in which the boys hone their "battle" skills is magical in its possibilities. Listening to Ender as he grows up, assumes leadership, realizes the consequences of some of his actions and undertakes reparations for harm he's caused is humbling and inspirational. I'm a Quaker, and thought I understood non-violence, but this militarily dominated world at war is possibly the most powerful pacifist argument I've ever read. Don't miss this.