Which innovative marketing campaign involved releasing 10,000 copies of a book with deliberate errors, offering a prize to readers who found them all?

Throughout publishing history, certain marketing campaigns have transformed relatively unknown books into cultural phenomena. These campaigns revolutionized how literature is promoted and sold, creating new benchmarks in retail marketing for the arts. Test your knowledge about these groundbreaking literary marketing strategies that changed how books reach readers and influenced modern publishing practices.

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Penguin's 1960 'Lady Chatterley's Lover' obscenity trial publicity
The 2003 'The Da Vinci Code' pre-release cryptic puzzle website
The 2019 'Masquerade' treasure hunt book with a golden hare prize buried somewhere in Britain
The 1979 'Pale Fire' Nabokov novel special edition with deliberately planted errors