When Cindy Elsharouni decided to share her passions of art and horses with the world through a unique series of adult coloring books, she didn't expect to eventually sell over 6,000 copies a month ...

The Witcher Adult Coloring Book, which is illustrated by Marianna Strychowska, Yu-Chen Tang and Scott Wade, is set for release Nov. 1. It is currently available for pre-order with a list price of ...

Dark Horse’s first coloring books will feature original art for Serenity and Avatar: The Last Airbender. Each book contains black and white illustrations on 45 heavyweight 10 x 10-inch pages.

Now, each of the top five publishing houses has plans to release coloring books. Though the market seems flooded — much like the vampire trend years ago — it shows no signs of slowing.

NPR's Melissa Block and Audie Cornish share letters from listeners about Wednesday's April Fools' story on backwards turntables and a story on adult coloring books.