Any French publisher that needed top tier art could look to the Gourdon brothers Michel and Alain for a solution. Above you see the work of the younger Gourdon—Alain, also known as Aslan—on a set of covers for Éditions de l’Arabesque and its series Les Nymphes. These are all from 1956 and 1957, and despite the assorted author attributions, Georges Roques—credited with five of these novels—also published as Luis Della Roca, and possibly others of these persons as well.
When you need a high quality cover who you gonna call?