Which major publishing house features a dolphin wrapped around an anchor in its historic logo, a symbol dating back to the 16th century?

Behind every great literary masterpiece stands a publishing house that shaped its journey to readers. These institutions have evolved their own distinct branding identities over decades or even centuries. This trivia challenge explores the fascinating intersection of literary publishing and brand identity - testing your knowledge of the logos, visual identities, and brand histories that have defined the book industry. Are you just a casual reader, or do you notice the publisher's marks that grace the spines of your favorite books?

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Penguin Random House
Doubleday
HarperCollins
Aldine Press (now part of Penguin Classics)