Apr 18, · Whether you're coloring to relax or just for fun, here are the best adult coloring books in a variety of topics. From cities to nature, from abstract art to realistic images, color whatever your Occupation: Editorial Fellow. Aug 14, · These days, coloring isn't just for kids. Some say adult coloring books help them cope with anxiety, and experts agree there's plenty of evidence to support that notion. What's more, the best adult coloring books are far from basic—the advanced options are chock-full of beautiful and insanely intricate designs; others are a little irreverent; some are more Author: Brigitt Earley.