Secret Service (Spy School, Bk. 5)

Despite only just beginning his second year at spy school, thirteen-year-old Ben Ripley has had a lot of field success - something graduates rarely experience. But he'd never have survived without help from experienced agents and his friends. Now he's been called in on a solo mission - and the fate of the United States of America is on his shoulders alone. The mission: prevent a presidential assassination by infiltrating the White House and locating the enemy operative. Ben may be in over his head this time. And when everything goes wrong, Ben must rely on his spy school friends to save his reputation . . . but even friends can double-cross or be swayed to the enemy's side.