Cheap paperback books are like sex: They claim attention, elicit memories good and bad, and get talked about endlessly. The mid-20th century was the era of pulp, which landed in America in 1939.

You could pick up these paper-bound books at the corner drugstore or bus station for a quarter. They had juicy covers featuring original (and sometimes provocative) art, blurring the lines between canonical literature (Emily Brontë and Honoré de Balzac) and the low genres of crime, romance, and Westerns. …