Which packaging innovation, first widely adopted in the 1930s, revolutionized children's literature by allowing young readers to determine the story's progression?

The publishing industry has seen many innovations in how books are packaged and presented to consumers over the centuries. From dust jackets to interactive elements, packaging design has played a crucial role in marketing literature. This trivia question tests your knowledge about a revolutionary packaging innovation that changed how readers interact with certain literary works.

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Choose Your Own Adventure format
Pop-up book mechanisms
Dust jacket with removable artwork
Boxed set collections with companion guides