People who are unable to cope with stress should start coloring, as it can help reduce anxiety and stress.
Many book stores, departmental chains and even airport gift shops are selling coloring books for adults as a way to de-stress, relax and calm the mind and body.
The goofy cartoon characters are now replaced with busy, complex designs and inspiring titles, such as 'Color Me Happy,' 'Color Me Calm' and 'Color Me Stress Free.'
Scottish illustrator Johanna Basford's first book, 'Secret Garden: An Inky Treasure Hunt and Colouring Book,' is an art therapy book for grown-ups, which is quickly catching on and is one of Amazon's bestsellers.
Bahram Olfati, vice-president of print for Indigo/Chapters, said coloring books were absolutely flying off the shelves, and were one of the most in-demand items at their store.
Olfati added that many of their customers appreciated coloring books as a new creative outlet, while others set aside time for coloring as a way to de-stress after a long day.