Which famous 20th century author collaborated with Guinness beer in 1929, creating advertising slogans that were never used but later became collectors' items?

Throughout literary history, famous authors have occasionally collaborated with brands and retailers in surprising ways. These collaborations have resulted in unique products, marketing campaigns, and cultural moments that blend commerce with high literature. Test your knowledge about these fascinating intersections of literature and retail marketing!

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Dorothy Parker
James Joyce
F. Scott Fitzgerald
Ernest Hemingway