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  • Hardcover $16.99

    Oct 04, 2016 | 432 Pages | Middle Grade (8-12)

  • Hardcover $19.99

    Oct 04, 2016 | 432 Pages | Middle Grade (8-12)

  • Ebook $10.99

    Oct 04, 2016 | 432 Pages | Middle Grade (8-12)

  • CD $45.00

    Oct 04, 2016 | 510 Minutes | Middle Grade (8-12)

  • Audiobook Download $23.00

    Oct 04, 2016 | 513 Minutes | Middle Grade (8-12)

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Praise

A New York Public Library Best Book for Kids, 2016

“Nods to classic time travel stories will delight some readers; those merely looking for a page-turning adventure will find that and more.”—Kirkus Reviews starred review

“In the end, Al cleverly engineers a total win, and if that seems unlikely considering the hazards of meddling with the past, readers won’t begrudge him.” —Booklist starred review

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