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.