one of my favorite book of the summer is Ender's Game.  it is a sy-fy book and takes place in the future.  a little kid named Ender has been chosen to go to space to get trained to fight the buggers, which is another alien species.  The humans have already fought against the bugger two times before and the humans won both.  in the battle station, there is a game where there are two armies and and they fight each other with freeze guns.  Ender goes to the battle station and becomes one of the best soldiers in all of battle school.  He gets his own army at a very young age.   His army is made from a lot of the newbies in the school. You are supposed to fight your first battle nine months, he fight his in the first three months.  He absolutely destroy the people in the other army.  Your supposed to fight one battle a week but then he fight one battle a day. Then at the end of the week he fought two battles in one day.  they always win.  Ender finally graduates to command school, the highest ranked place in the army.  He starts playing the game there which is a game where you are a flight of ships and you fight against pretend buggers.  He becomes so good that he takes the final challenge.  Their are a billion ships waiting near a planet.  he blows up the plant which blows up all of the "buggers". Then he learned that it wasn't pretend and he actually killed millions of buggers. He becomes really sad at the end because he learned that the buggers were nice when every one in his childhood told him they were mean.