Ender's Saga 07 - Shadow Puppets

In Shadow Puppets, Orson Scott Card continues the storyline of Shadow of the Hegemon, following the exploits of the Battle School children, prodigies who have returned to an Earth thrown into chaos after the unifying force of the alien invasion they stopped in Ender's Game and Ender's Shadow has dissipated. Foremost among these whiz kids is the brilliant Bean who, in Shadow of the Hegemon, rescued his comrades from his nemesis-the dastardly Achilles. Now, the down-but-not-out evil genius is again scheming towards global domination and vengeance against the irrepressible Bean. It's up to Bean and his newfound love, Petra, to outwit the young psychopath and save the world.