The Flip-Flop from Outer Space

From collector Bill Taylor of Alberta, Canada, comes the only example I have ever seen of a reprinted book that used the original back cover art for the front cover, and vice versa.

Skyfall, by Harry Harrison, was released as Ace 74962-X in 1978, and then reprinted as 76941-1 in 1985.

The top picture is a "full cover" scan. Click any image for a larger view.

All scans are courtesy of Bill Taylor.