The Coloring Craze: Adult Coloring Books

Also, the Nov 16 issue of Publishers Weekly features a story about the adult coloring book phenomenon.

http://publishersweekly.com/pw/by-topic/new-titles/adult-announcements/article/68688-the-coloring-craze-adult-coloring-books-2015.html

Coloring is great for relaxation, and there is a wide variety available through amazon.com and other retailers.  They range from funny ones (Unicorns are Jerks, The 1990s Coloring Book) to more scientific (The Art of Nature Coloring Book).

Thanks to Erin for the information!