Which of these publishing houses, still in operation today, is considered the oldest continuously operating publisher in the world (founded in the 1600s)?

The publishing industry has a rich history of companies that have shaped literature for centuries. These publishing houses have survived wars, economic depressions, and the digital revolution while continuing to bring influential works to readers worldwide. This trivia tests your knowledge about one of the oldest publishing brands still operating today - a testament to enduring customer experience and brand recognition in the literary world.

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Cambridge University Press
Oxford University Press
Houghton Mifflin Harcourt
Penguin Random House