Why millions of grownups are buying these coloring books for adults | Creative teaching and learning | Scoop.it
From gizmodo.com - March 27, 2015 4:02 PM

"Amazon's Top 100 book list changes hourly, but there are a few mainstays right now: All the Light We Cannot See, of course, and the unreleased Go Set a Watchman. Oh, and two coloring books for grownups ..."