Jamie is a 16-year-old math whiz. Summerlee, his older sister, is in the grip of a wild phase. Tensions at home run high. When Summerlee wins a 7.5-million-dollar lottery, she cuts all ties with her family. But money can cause trouble--big trouble. And when Jamie's younger sister Phoebe is kidnapped for a ransom, the family faces a crisis almost too painful to bear. Jamie thinks he can use game theory--the strategy of predicting an opponent's actions--to get Phoebe back. But can he outfox the kidnapper? Or is he putting his own and his sister's life at risk? An astute, page-turning novel from a superb storyteller.