Shadow series (Orson Scott Card)

Welcome to Battleschool. Growing up is never easy. But try living on the mean streets as a child begging for food and fighting like a dog with ruthless gangs of starving kids who wouldn't hesitate to pound your skull into pulp for a scrap of apple. If Bean has learned anything on the streets, it's how to survive. And not with fists. He is way too small for that. But with brains. Bean is a genius with a magician's ability to zero in on his enemy and...

As the nations of the earth attempt to control the children trained at Battle School, Peter Wiggin continues to consolidate his power with the help of Bean and Petra.

Bean moves with three of his children into a derelict space colony ship where they hope for a cure to engineered genes that give them high intelligence and short lives, a situation that is complicated when space-time distortions cause them to be forgotten by humanity.