Robert McGinnis (born 1926), is an American artist and illustrator known for his illustrations of over 1200 paperback book covers,and over 40 movie posters, including Breakfast at Tiffanys (his first film poster assignment),Barbarella, and several James Bond and Matt Helm films.
Here is a wonderful collection of some of his work. NOTE: Pulp novels sometimes demand "racy" covers. You will find a little nudity and suggestive images. But then that is part of the fun.