When PENGUIN was founded in 1935 with the radical concept of producing inexpensive paperback editions of high quality books, it adopted an equally progressive approach to typography and cover design. Under Jan Tschichold in the 1940s and Germano Facetti in the 1960s, Penguin became an exemplar of book design.
I got these from Things magazine.. who sweet mother! have put together a kick butt gallery of penguin book covers. Includes beautiful covers overseen by Jan Tschichold as well as the late typographer Hans Schmoller. My favorite years are between 1961-1972 when Italian art director Germano Facetti was in charge of design. Facetti enlisted Polish graphic designer Romek Marber to redesign the look of the Penguin series and the rest is history.