There was a book that I'd read a while back but can't for the life of me remember the name of. There was a boy who went to space during an alien war and managed to defeat the aliens by taking out their leader.
The boy's name is a blank, however, he was odd, as in not normal. He was the third child and the book started with some sort of medical procedure.
Ender's Game by Orson Scott Card?
The boy's name was Andrew Wiggin, but was nicknamed "Ender". He was a third child (two older siblings called Valentine and Peter), and at the start of the book has a medical procedure to remove a monitoring device. He controlled a fleet of spaceships via an instantaneous communication device, and defeated the aliens, the "formics" or "buggers", by destroying their homeworld.
A fuller summary is available at wikipedia.
