A few months ago, I caved: I bought myself a coloring book. And maybe you did, too, or perhaps you received one as a gift for the holidays. According to a recent Fortune article, adult coloring books are one of the biggest contributors to this year’s boost in print-book sales. With over 11,000 search results total, five of Amazon’s current top 15 best-selling books are coloring books.

Source: A Neuroscientist Explains Adult Coloring Books — Science of Us