Online coloring books for kids is a unique and interesting opportunity that could prove to be both fun and profitable. This online business concept is very straightforward. Simply develop a website ...

When Penguin Random House announced recently that it had acquired world rights to the next two adult coloring books from Johanna Basford, the so-called queen of coloring, it was just the latest sign ...

Opinions expressed by Entrepreneur contributors are their own. Why do our coloring-book days end with our childhoods? Recently, they haven’t. You may have seen the think pieces — adults en masse are ...