In 1962, Penguin Books carried out an unprecedented experiment in Anglophone paperback book cover design. Deploying a new design grid created by Romek Marber, they released a flood of crime and mystery novels wrapped in simple, efficient, green and black covers. An unheralded peak of late-Modernist design, many of these covers still stand out today as some of the most interesting and compelling ever created for Penguin—or any press!