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

Publishing houses have developed distinctive brand identities that help readers recognize quality literature at a glance. Their logos often contain subtle nods to literary tradition while maintaining contemporary relevance. How well do you know the visual branding of these influential guardians of literature? Test your knowledge of these iconic symbols that grace the spines of countless beloved books.

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Penguin Random House
Doubleday
Aldine Press/Doubleday
HarperCollins