There are so many coloring books for adults online, but we've rounded up 30 of our favorites. There are some beautiful (and interesting) choices here, so you're sure to find something you'll like!

Filled with animals, mandalas, flowers, paisley patterns, and more, the Adult Coloring Book: Stress Relieving Designs by Cindy Elsharouni ($7) is perfect for those who love nature-inspired art.

1. Adult Coloring Books: A Coloring Book for Adults Featuring Mandalas and Henna Inspired Flowers, Animals, and Paisley Patterns Paperback – July 20, 2015 Amazon Buy it for $6.85 ...

Dover Publications has sold more than 3 million adult coloring books with titles like “Flower Fashion Fantasies.” Quarto Publishing will have 1.3 million in print this year ranging from ...

In fact, four out of the top ten selling books on Amazon are adult coloring books. You can get post card assortments to send to your friends as well as different animal and flower themed books or ...

Dover Publications has sold more than 3 million adult coloring books with titles like "Flower Fashion Fantasies." Quarto Publishing will have 1.3 million in print this year ranging from mandalas ...

There is also “ The Islamic, Adult Coloring Book ” by Theresa Corbin (Create Space Independent Publishing Platform, $10), which is aimed at the non-Muslim who wants to learn more about this faith.

Naomi Winston, 'Coloring Book Girl,' is on a mission to empower children and others through her multicultural coloring books.

Coloring books for adults — a genre once considered little more than a novelty — are suddenly a big business, a bright spot in the financial results of publishers and retailers alike.

The books are a wonderful way for adults to relax and get in touch with their inner artist. Coloring the flowers, castles, trees, animals, and other designs allows adults to get creative, and ...