Steven Marcus is best-known for The Other Victorians (1964) [below], a study of Victorian pornography in which he coined the term pornotopia.
The book is a classic in the academic study of pornography.
I’ve never been able to find out the identity of the author of the illustration on the cover. It’s in the skinny style of Raphael Kirchner (1867– 1917) and Léo Fontan (1884 – 1965) which was popular in the late 19th and early 20th centuries. That’s all I know. Anyone?