Shusterman, Neal.

Game changer /Neal Shusterman.

387 pages

All it takes is one hit on the football field, and suddenly Ash's life doesn't look quite the way he remembers it. Impossible though it seems, he's been hit into another dimension, and keeps falling into universes that are almost-but-not-really his own, each one stranger than the last. And if he isn't careful, the world he's learning to see more clearly could blink out of existence.

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1.Time travel--Fiction.2.Football injuries--Fiction.Dynamic Details
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