If you're an adult colorer looking for some advanced templates to challenge you, then break out the colored pencils because ...

We rounded up the best adult coloring books that you can buy on Amazon for less than $15. Shop adult coloring books for stress and anxiety relief now.

As adult coloring books hit the bestseller list on Amazon, NPR's Audie Cornish talks to illustrator Johanna Basford. This story originally aired on April 1, 2015, on All Things Considered.

Not all adult coloring enthusiasts are in it for stress relief. Jenny Fenlason, a home-schooling mother of four in Minneapolis, says she sees it primarily as a social activity.

Adults rediscover joy of coloring books 02:26 "People just love this. . I think they feel successful, like they've finished something," said Jane Henze, the adult-programming director at DeForest ...

If you're an adult colorer looking for some advanced templates to challenge you, then break out the colored pencils because here are 25 free printable coloring pages for adults! Related: 35 Cute ...