Relieving stress and restoring calm are common themes on the adult coloring book market. "Balance (Angie's Extreme Stress Menders Volume 1)" by Angie Grace is one in a series of such coloring books.

Adult coloring books are giving Harper Lee a run for the money on best-seller lists this summer. Dover Publications has sold more than 3 million adult coloring books with titles like “Flower ...

It’s very calming, very therapeutic,” Norman, 49, of Winter Garden said. Diane Merchant, manager of the Minneola library, said she started the coloring events at the suggestion of a friend.

This June 17, 2015 photo shows a colored-in page from the adult coloring book "Splendid Cities: Color Your Way to Calm," by Rosie Goodwin and Alice Chadwick, Hachette Livre (Editions Marabout). It ...

Coloring books are no longer just for the kids. In fact, adult coloring books are all the rage right now. And while researchers and art therapists alike have touted the calming benefits for over a ...

A page is colored in the adult coloring book "Splendid Cities: Color Your Way to Calm," by Rosie Goodwin and Alice Chadwick, Hachette Livre (Editions Marabout).

This June 17, 2015 photo shows a colored-in page from the adult coloring book "Splendid Cities: Color Your Way to Calm," by Rosie Goodwin and Alice Chadwick, Hachette Livre (Editions Marabout).