When I was in the 7th grade I discovered Edgar Rice Burroughs. My fascination with his stories continued through high school. There was of course Tarzan but there was also Barsoom and Pelucider not to mention Venus. Silly fantasy but it could have been worse - I might have become interested in Ayn Rand. Burroughs was a master of "graphic prose." It is said that a picture is worth a thousand words: well Burroughs could do it with 20 words or less. Fifty years latter I can't really appreciate Edgar Rice Burroughs like I did when I was young. I watched the movie John Carter of Mars but wondered off to do something else abut a quarter of the way through it. What I can do is think about what attracted me to the works of Edgar Rice Burroughs. It was the art work on the covers of those Ace paperbacks by Frank Frazetta.
There is little doubt that cover art can sell paperbacks and Frank Frazetta was a master marketer.