"Jamie is a sixteen-year-old maths 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 their 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?"--Back cover.
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