I enjoyed doing the gag covers better than the story ones because they were usually simpler. A cover based on an incident in the plot took a great deal of staging to tell a little story that was still part of the book. And it had to make sense on its own.
“Nothing is more fairly distributed than common sense: no one thinks he needs more of it than he already has.”
“To find out what one is fitted to do, and to secure an opportunity to do it, is the key to happiness.”