Which renowned 20th century author served as a brand ambassador for Guinness beer in the 1930s, writing promotional pamphlets including one titled 'Guinness Guide to Oysters'?

Throughout publishing history, notable authors have served as brand ambassadors for various products, lending their literary credibility to commercial campaigns. These partnerships between literature and commerce have often sparked debate about artistic integrity versus commercial opportunity. This poll tests your knowledge about some of the most famous (or infamous) author-brand partnerships that have shaped both literary and advertising landscapes.

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Dorothy Parker
F. Scott Fitzgerald
Dorothy L. Sayers
Ernest Hemingway