Which major publishing house's logo features a dolphin wrapped around an anchor, a symbol dating back to the 16th century that represents the Latin phrase 'festina lente' (make haste slowly)?

Publishing houses have some of the most iconic logos in the arts and literature world, many with fascinating histories and hidden meanings. These corporate symbols often reflect the publisher's heritage, values, or literary focus. Test your knowledge about these literary emblems that appear on millions of book spines worldwide. How well do you know the stories behind the publisher logos you see on your bookshelf?

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