Shadow of the Giant (Shadow Saga) Orson Scott Card

The Ender Saga continues with Shadow of the Giant, which parallels the events of Ender's Game from a different character’s point of view. Bean's past was a battle just to survive. He first appeared on the streets of Rotterdam, a tiny child with a mind leagues beyond anyone else. He knew he could not survive through strength; he used his tactical genius to gain acceptance into a children's gang, and then to help make that gang a template for success for all the others.