Description from Goodreads: "In order to develop a
secure defense against a hostile alien race's next attack, government
agencies breed child geniuses and train them as soldiers. A brilliant
young boy, Andrew 'Ender' Wiggin is drafted to the orbiting Battle School for rigorous military
training. Ender's skills make him a leader in school and
respected in the Battle Room, where children play at mock battles in
zero gravity. Yet growing up in an artificial community of young
soldiers Ender suffers greatly from isolation, rivalry from his peers,
pressure from the adult teachers, and an unsettling fear of the alien
invaders. Is Ender the general Earth
needs? Ender's
two older siblings are every bit as unusual as he is, but in very
different ways. Between the three of them lie the abilities to remake a
world. If, that is, the world survives."
Check out the trailer for last summer's movie adaptation.