Which major publishing house's logo features a dolphin wrapped around an anchor, a design that dates back to the 16th century?

Throughout literary history, publishing houses have established iconic brand identities through their distinctive logos. These visual symbols often become as recognizable as the beloved books they produce. This trivia challenges you to test your knowledge about famous publishing house logos that have adorned the spines and covers of countless classic and contemporary works. How well do you know the visual language of literature's greatest producers?

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