“‘This is my suit. Color it gray or I will lose my job,’ reads a caption next to a picture of a man getting dressed for work” in 1961’s Executive Coloring Book. “The coloring books that followed managed to cover, between them, a selection of the decade’s neuroses: national security, the red scare, technology, sex, mental illness. … There were coloring books that made fun of communists and coloring books that made fun of people who were scared of communists.”