X Marks the Spot!
Upon moving to their grandfather's house, two boys discover a treasure map in the attic and must learn how to use it in order to find their surprise.
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11 released booksMath Matters®
Math Matters® is a 11-book series with 11 released primary works first released in 1999 with contributions by Barbara deRubertis, Annie Cobb, and Linda Williams Aber.
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