I will not give away any further details, but I will say this book is not all about aliens, and laser guns, and space crafts, but follows the deep psychological impacts that are brought on these children that are raised by military scientists on a space station. I would highly recommend this book to sci-fi fans and casual readers alike.
The novel does have a number of sequels and spin-offs, though they are not as popular as Ender's Game, and there have been rumors floating around for years of a film adaptation, but last I checked it is stuck in development hell. A video game based on the battle training which accounts for much of the novel is also trapped in development. I guess the portrayal of Ender's Game in other media can only be described as cursed, though a few spin off comic books have been released by DC Comics.