Which of these literary brand mascots was created in 1935 and has appeared on more than 2 billion books worldwide?

The publishing industry has created some of the most memorable brand mascots that have become cultural touchstones. These characters not only sell books but have become powerful marketing tools that transcend their original purpose. Test your knowledge of the iconic mascots that have helped define major publishing houses and literary brands over the decades. How well do you know these literary brand ambassadors?

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Penguin Books' Penguin
Barnes & Noble's Bookworm
Random House's Crown
Oxford University Press' Owl