During his three year stint as Head of Design for Penguin Books (1946-1949), Jan Tschichold created the template for all Penguin Books, with designated positions for the logo, author's name and book title. His stark design was a radical approach, with a streamlined, modern appeal. Over time, even after the inclusion of cover illustration, the strong grid asserts itself as pure Penguin.
Are you a purist for the Penguin typography only covers? Well, I can't deny my love for Quentin Blake's drawings.