Check out the Pelican Project at the things magazine website. It features photos of the book covers from Pelican the non-fiction imprint of Penguin Books.They may be torn and tattered but they have that recognizable design that can be traced from the 1930’s to the 1980’s.*
*According to Wikipedia Pelican was “originally founded in 1937, Pelican Books combined important topics with clear prose to create inexpensive paperbacks for a broad audience. Before being discontinued in 1984, Pelican Books published thousands of accessible, stimulating books covering a wide range of subjects from classical music to molecular biology to architecture. The imprint was relaunched in April 2014, with the first five titles appearing in May.
( The source of all ATG Quirkies is John Riley of Gabriel Books)