Things Magazine has compiled a collection of Pelican Books covers, called The Pelican Project.  Interesting to see the progression of covers from the 1930’s to the 1980’s. My favorite decade is the 1960’s, when Germano Facetti headed up design from ‘62 to ‘71. Not sure if this is an on-going project, wherein more covers will be added, but it’s still an impressive collection to check out.

http://www.thingsmagazine.net/projects/pelican.htm