I read this as a novella when it first came out and read the book it was expanded into. IMO, it really lost a lot by being expanded into an entire book. The great part of the novella or even very long story was that you didn't really understand that he was actually the real commander until right at the very end. The story starts with him as a child leading children 'armies' against other children armies in what was a lot like laser tag (20 years before laser tag was invented). The fact that he becomes the Supreme Commander while still thinking he was preliminary training is an idea that is a cliche now, like in 'Third From the Sun', where a desperate humanity is trying to escape TO Earth rather than from it. It was a great, original idea then just like Ender's slowly collapsing under the weight of the incredibly relentless 'training' is a beaten down idea. In the story, he destroys the alien 'homeworld' as an act of rebellion-he thinks it will disqualify him from Command School, as firing on a planet is strictly forbidden. He knowingly sacrifies his entire 'fleet' and gives up-telling them to attack the homeworld, as his fleet is vastly outnumbered and in a hopeless situation. He commits genocide to get out of having to train in increasingly impossible battle situations. A great story, probably about to be completely screwed as a movie. In the ads, they tell you right away he is the Commander, which was the original power of the story-him not knowing he has the supreme command of the human race in his hands.