A fellow named Joe Kral has a flicker set of the coolest Penguin book covers he could find.
Unfortunately no covers of Graham Greene's 1960's novels, so I've decided to scan one and send it to him.
I've always loved those covers. Most were illustrated by Paul Hogarth but I'm sure there was one done by Sidney Nolan.
Graham Greene would get cranky if his publisher stuffed up his book covers. After a few stuff ups, Penguin mostly employed Greene's fave illustrator, Paul Hogarth to do the covers at £35 a drawing.
Here's a nice little piece on Hogarth and Greene's long partnership.