Colour of money: the rise of colouring books for grown-ups, The Independent

Sales of colouring books aimed at stressed-out grown-ups are rocketing. And entrepreneurs are now looking to fill in new spaces in the market, from DIY birthday cards to calligraphy

Outside the Lines: Coloring Books for Grown-Ups Are Kind of Awesome

Colouring books for adults top bestseller list, Art and design books

Adult Coloring Mindfulness Coloring Sheets Pack - Twinkl

New Releases: The best-selling new & future releases in

Adult Coloring Books and the Rise of the “Peter Pan” Market

The most ridiculous adult colouring books, The Independent

Which Coloring Books have Poor-Quality Paper? (2 Tips for ) - Coloring Butterfly

Coloring for Grown Ups

Why adult coloring books are good for you