Which major publishing house features a dolphin wrapped around an anchor in its historic logo?

Publishing houses develop distinctive logos that become as recognizable as the books they produce. These visual identities often carry rich symbolism connecting to literature, knowledge, and the publishing tradition. How well do you recognize these iconic symbols of the literary world? Test your knowledge of publishing house logos that have graced the spines and title pages of countless beloved books throughout history.

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Penguin Random House
Aldine Press (now part of Houghton Mifflin Harcourt)
Oxford University Press
HarperCollins