By A Mystery Man Writer
An Interview with John Romita by Tom Spurgeon - The Comics Journal
American Comic Book Chronicles: 1960-64 by TwoMorrows Publishing - Issuu
NetWorld!, by David H. Rothman
How adult coloring books became a million-dollar trend
29 Best Books To Read In Your 50s
Adult Colouring Books: 17 Of Our Favourite Books
Create by Arts Council England - Issuu
The Subversive History of Adult Coloring Books, On the Media
The First Adult Coloring Book: See the Subversive Executive Coloring Book From 1961