HARRY POTTER
The books: 450 million copies sold worldwide (seven volumes)
The films: $7.7 billion worldwide box office gross (eight movies)
TWILIGHT
The books: 116 million copies sold worldwide (four volumes)
The films: $2.45 billion worldwide box office gross (four movies)
MILLENNIUM SERIES (Dragon Tattoo)
The books: 63 million copies sold worldwide (three volumes)
The Swedish films: $214 million worldwide box office gross (three movies)
THE HUNGER GAMES
The books: 16 million copies sold in the U.S. (three volumes, worldwide numbers unavailable)
The films: TBD.
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