Above, just another brilliant effort from illustrator Paul Rader, this time for The Reluctant Nympho by Joan Ellis, 1968. 

Above, a cover for a rare triple novel featuring the sleaze work of Joan Ellis, Jill Hammond, and March Hastings. We like how the stories cover three different stages of life—Teen-Age Sex Party is high school, Office Playmate is the working world, and Experiment in Adultery is married life. A follow-up triple included Middle-Aged Miscreants, Retired but Desired, and One Dick in the Grave. Well, not really. But we missed our calling, don't you think? The cover art here is from Paul Rader, and the copyright is 1968. 

Above and below are assorted covers featuring yet another fun mid-century paperback art motif—the looming or threatening shadow. The covers are by the usual suspects—Rader, Phillips, Gross, Caroselli, Nik, as well as by artists whose work you see less often, such as Tony Carter’s brilliant cover for And Turned to Clay. That's actually a dust jacket, rather than a paperback front, but we couldn't leave it out. You’ll also notice French publishers really liked this theme. We’ll doubtless come across more, and as we do we’ll add to the collection. This is true of all our cover collections. For instance, our post featuring the Eiffel Tower has grown from fifteen to twenty-two examples, and our group of fronts with syringes has swelled from thirteen to twenty-six images. We have twenty-four twenty-six—see what we mean?—more shadow covers below, and thanks to all original uploaders.