Penguin Books revolutionized publishing in the 1920s.
 Between 1947 and 1949, the German typographer Jan Tschichold redesigned 500 Penguin books, and left Penguin with a set of influential rules of design principles brought together as the Penguin Composition Rules, a four-page booklet of typographic instructions for editors and compositors
 In May 1960, Tony Godwin was appointed as editorial adviser, rapidly rising to Chief Editor from which position he sought to broaden the range of Penguin's list and keep up with new developments in graphic design

