There are so many coloring books for adults online, but we've rounded up 30 of our favorites. There are some beautiful (and interesting) choices here, so you're sure to find something you'll like!

And Target started carrying adult coloring books in 1,300 stores in August and within months rolled them out to the rest of the chain. Initially, the big-box retailer was carrying only four titles ...

Now, of course, adult coloring books are ubiquitous, crowding bookstores and bestseller lists. Coloring-book groups have sprouted up everywhere — in libraries and cafes, on Facebook and Instagram.