Fourteen-year-old McKenna's little sister Emma is losing her vision to Stargardt's disease. McKenna also begins having trouble with her vision but keeps it a secret. She prepares for a new rigorous sled dog race through the Canadian wilderness to help her sister and faces shifting lake ice, owl attacks, snowstorms, and bitter temperatures. With her vision failing, McKenna risks her own survival as well as that of her team to keep her secret.
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Booklist Starred Reviews, 11/15/2019 Kirkus Reviews Starred, 10/1/2019 School Library Connection, 11/2019 School Library Journal, 12/2019
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