Red hot is the only way to describe the adult coloring book trend. The books are a staple on the bestseller list at Amazon and the title that kicked off the craze in 2013, “The Secret Garden: An Inky ...
Doris Boettner was young when she started coloring. “I colored as soon as I could hold a crayon. My mother started me coloring, I think, because she liked to,” she said. Boettner continued the ...