Now at last I understand why the French so closely associate the Metal Hurlant artist Druillet with Lovecraft. It wasn’t just the Metal Hurlant work etc. His art was used for the covers of their seminal paperback series, and a great many of the French must have first encountered their Lovecraft that way. I’d never seen these before, still less all in one place, and I guess they must be so collectable and/or cherished that they’re rarely seen for sale. Anyway, here’s the set of covers, in the largest versions of each that I could find.
The last appears to be an anomaly in terms of the design. I’m guessing that the “et Derleth” on the cover might mean it’s “The Colour out of Space” fronting some of Derleth’s posthumous collaborations?
These covers don’t necessarily have much relationship with the stories they represent. Some might be from his other work such as Salammbo.