Game Theory by Barry Jonsberg

Jamie loves math. Recently, he has become interested in game theory, the strategy of determining your opponent's actions. He practices it with his clever, precocious younger sister, Phoebe.

Jamie's older sister, Summerlee, buys a lottery ticket on her 18th birthday and wins 7.5 million dollars. Already rebellious, the money causes her to break free of her family. Against her parents' advice, Summerlee lets the world know that she won and goes on a spending spree.

One day when Jamie and Phoebe go to the grocery store together, Phoebe is kidnapped. The sudden horror and remorse Jamie feels is gut wrenching. Phoebe is the best of the family. Even Summerlee who can be nasty to anyone is never cross with Phoebe.

Is the kidnapping related to Summerlee's sudden financial windfall? No one knows for sure, but they do know that the kidnapper(s) will only speak with Jamie. Maybe he can use game theory to outwit the kidnapper and get Phoebe back. But dealing with the kidnapper without the police is a risk.

This is a story filled with tension and suspense. So if you are looking for something with some mystery that is a little different, check this one out.

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