Adult coloring books is the hottest new segment in publishing and everyone is getting involved. Disney has released a new 3D coloring book based on popular characters, to mainstream celebrities such as Kim Kardashian and George R.R. Martin who have jumped into the fray. The current coloring-book craze was ignited in 2013, when Scottish illustrator Johanna Basford published “Secret Garden.” The seemingly obscure offering had an initial printing of 16,000, but has since exploded into a ...
