Adult coloring books are selling like crazy. Here's why. - Vox

Break out your crayons: Coloring books are back.

This coloring book has 36 one sided pages to color. It is highly detailed for those who like a more challenging coloring experience.Here is a video of

It's Complicated: A Challenging Coloring Book for the Daring Coloring Artist

Adult coloring books selling like crazy

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The coloring book trend is dead. Happy National Coloring Book Day

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Adult coloring books are selling like crazy. Here's why. - Vox

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