I'm sure there are better examples, but this little countdown made me laugh.
http://www.onlinecollege.org/2010/08/11/25-worst-book-covers-of-all-time/
http://www.onlinecollege.org/2010/08/11/25-worst-book-covers-of-all-time/
Amen brother, amen. The specific type I was thinking of is a generic spaceship sitting in a starfield or hanging over a planet (if I remember correctly, usually done by Chris Foss, Chris Moore or John Berkey).No Such Agency said:Then again, there are oh so many fantasy & SF cook covers that bear almost NO relation to the book's plot, and are either pointlessly hallucinogenic, or pointlessly sexual. It's not even an interesting cliche any more.