Category:Artist:None Images

From ISFDB

This category is for cover images where there is no artist because there is no "Art". The cover is blank, or has only a geometric design, or only lettering, or perhaps only stock photographs or stills from a film or TV show, or some combination of the above.

Covers with artist "Unknown" could, at least in theory, have an artist assigned if the proper credit info were to be discovered. These images could not, even in principle, have an artist credit.