During the time of writing this article (August 2015), a quarter of Amazon’s top twenty best-selling books are coloring in gossip columns. So what exactly is a adult coloring book, and how do they’re currently outselling top fiction authors with
During the time of writing this article (August 2015), a quarter of Amazon’s top twenty best-selling books are coloring in gossip columns. So what exactly is a adult coloring book, and how do they’re currently outselling top fiction authors with