Book adaptation movies are dominated by the fantasy genre, with all eight Harry Potter films among the 25 highest-grossing book adaptations at the box office. Business Insider compiled the list using data from Box Office Mojo, excluding comic-book and stage adaptations and not adjusting for inflation. Eight films crossed the $1 billion threshold. Book adaptations have grown in popularity since the 1990s, now accounting for 70% of top-grossing films in theaters, according to 2024 data.
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