I found some Barlowe art I forgot existed. This was the cover for The Darkness on Diamondia by A. E. Van Vogt. The Alien Life of Wayne Barlowe contains high-quality reproductions of much of his cover art, but it’s only the tip of the iceberg. For books like this, The Telzey Toy, and Retief and the Pangalactic Pageant of Pulchritude I can’t do any better than scanning the covers of used paperbacks.