A little tweeting birdie pointed me to the website of one Carlton Hibbert, a U.K.-based illustrator and designer. Carlton has taken to posting intricate patterned images for download and coloring ...

His Golden Ratio Coloring Book, which has raised over $30k in crowdfunding in 5 days, features detailed renderings of the intelligent patterns found in nature, otherwise known as Phi, the Golden ...

Patterns of the Universe, out tomorrow, contains 65 different coloring options that let you illustrate everything from fractals to octahedrons.

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 ...