BOOKS

Books for Everyone

Over 300,000 copies sold!

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A New York Times Bestseller!

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For ages 6 to 10

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Books for Math Lovers

Winner of MAA Book Prize

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A Collection of Fun Articles

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Winner of ALA Choice Award

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Video Lectures from The Great Courses

Learn to do Math in Your Head!

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Taught in a Fun and Magical Way!

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My most advanced video course! 

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Play Games and Puzzles better with a little bit of Math! 

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My newest course. Pure Fun! 

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