Sticks -- Joan Bauer
If you've got a 10-year-old boy that's obsessed with either pool or math, this would be a good bet.
Otherwise, I'd give it a miss unless you're a Joan Bauer junkie.
(But even if you are a fanatic, be forewarned--it really isn't her best book. At all. It has its moments and all, but overall--pretty weak. Think about it. I've been a fan for a long, long time, and I hadn't even heard about this one until pretty recently. And it isn't because it's new--Sticks is actually her third book--it came out in 1996. It's just not her best. I did kind of like Francine, though. She was a 12-year-old wannabe Vegas magician who reminded me a little bit of Anastasia Krupnik, if she was more outgoing, a sidekick rather than a main character, and from New Jersey.)