Enders game is a story about the protagonist Andrew ‘ender’ wiggin.

the book begins with the removal of Enders monitor which is a futuristic device that lets his superiors connect to his body without any removal his free will, it also lets them see through his eyes to “protect” him from harm. The real reason however for the monitors removal is that they believe that he is ready to join the battle school. This is because over the period of 50 years the alien race ‘buggers’ have invaded earth twice and the humans are taking precautions to prevent a third one.