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

Break out your crayons: Coloring books are back.

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10 reasons to give up your coloring books and buy printables instead

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People Of Walmart: The Good, The Bad And The WTF!!: Adult Coloring Book (The Good, The Bad, and The WTF Chronicles)

How to find hobbies as an adult: The ultimate guide - Deseret News

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How adult coloring books became a million-dollar trend

Adult Coloring Books Going Mainstream (At Least Some of Them)

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