[CLICK IMAGES TO ENLARGE]
I know that I have posted a scan of Rogue Roman before, but what you see above is a new scan of a different copy of the novel (I have two). I only recently obtained a copy of Child of the Sun (for cheap at — where else? — Value Village), with cover art by Frazetta, so that scan is new, too, as are the others. Seeing those two covers together, Rogue Roman and Child of the Sun, one can appreciate, I think, the significant change — some would say, improvement — in Frazetta’s oil technique from the 1960s to the celebrated paintings of the 1970s.
I have no idea who painted the uncredited covers of The Street of the Sun or Mistress of Falconhurst, although the latter includes the initials (?) RES in the lower left-hand corner. If you know who RES is, feel free to post the artist’s name in the comments section below. [Apparently, RES is Robert E. Schulz; see comment section below.]
As for The Street of the Sun, let’s just say that although the loose illustrative style is attractive, and distinctly less “old-fashioned” than the other three, it is entirely unexceptional for the time period (the late 1960s) and could have been produced by any number of artists.