Which classic novel saw sales increase by over 800,000 copies after receiving a celebrity endorsement in 2004, transforming it from a respected literary work to a major commercial success?

Throughout literary history, famous endorsements have dramatically changed the fortunes of books and authors. From Oprah's Book Club selections skyrocketing to bestseller status overnight to celebrity book clubs transforming unknown works into cultural phenomena, the power of endorsement in publishing is undeniable. This trivia question explores how one particular famous endorsement revolutionized a classic book's reception in modern times, demonstrating the continued influence of celebrity recommendations in the literary marketplace.

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Anna Karenina by Leo Tolstoy, endorsed by Oprah Winfrey
The Great Gatsby by F. Scott Fitzgerald, endorsed by Leonardo DiCaprio
One Hundred Years of Solitude by Gabriel García Márquez, endorsed by Barack Obama
Pride and Prejudice by Jane Austen, endorsed by Reese Witherspoon