If you're an adult colorer looking for some advanced templates to challenge you, then break out the colored pencils because here are 25 free printable coloring pages for adults! Related: 35 Cute ...

25 Free Printable Coloring Pages for Adults 1. Mandala Shark Coloring Page for Adults. iStock. 2. Photographer Taking Photo Advanced Coloring Page. iStock. 3. Laptop Scene Advanced Coloring Page.

Many new coloring book titles are being marketed to stressed-out, work-addled adults, who benefit from the quiet zen that a coloring session can bring.

5. Coloring. The last application of coloring book for adults on our list doesn’t overwhelm with tons of features that you might never use, nor does it include thousands and thousands of pictures.

Many new coloring book titles are being marketed to stressed-out, work-addled adults, who benefit from the quiet zen that a coloring session can bring.

Once obscure, adult coloring books have reached new levels of popularity. But do you know exactly why a page and some pencils can do your mind some good? CNN values your feedback ...