Ender's Game is a science fiction novel that tells the story of Andrew Wiggin (nicknamed Ender by his sister, Valentine.) The story takes place on Earth in the future. Earth has been attacked twice by an alien species called Buggers, nearly destroying the human race. Mankind begins training young geniuses to become soldiers and commanders to fight in Earth's defense if the Buggers should ever attack again. Ender is extremely intelligent, and at the age of six years old, he goes to Battle School to be trained. Ender quickly rises to the top in Battle School and begins training in order to command Earth's fleet.