Adult coloring books is not just for kids anymore and it’s the latest trend in stress relief.
Booksellers are having a hard time keeping them on the shelves.
Adult coloring books are similar to children’s, but with a few upgrades.
The paper is thicker and the designs are more intricate.
Many are marketed as a way to relieve stress.
Retailers say they’re having trouble keeping adult coloring books on the shelves.
One called “The Secret Garden” has sold over a million copies.