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All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Coloring apps — which let ...

Adult coloring books have been consistently popular since 2013 when Johanna Basford’s elegant, calming Secret Garden started the trend. Since Secret Garden was released, there have been a plethora of ...

Within the last decade adult coloring books have surged in popularity. The vast selection available today includes abstract images, mandalas, and your beloved characters ranging from Marvel to Disney, ...