Facetti was instrumental in redesigning the Penguin line, introducing phototypesetting, the 'Marber grid', offset-litho printing and photography to their paperback covers.
In 2013, The Minories, Colchester exhibited a retrospective of graphic work designed by Romek Marber for Penguin books, The Economist, New Society, Town and Queen magazines, Nicholson’s London Guides, BBC Television, Columbia Pictures, London Planetarium and others.
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In 1961, impressed by Marber’s covers for The Economist, Germano Facetti commissioned Marber to design covers for Simeon Potter's Our Language and Language in the Modern World.