Hungrier Than Hunger Games: These Blockbusters Really Stretch Their Books

Fans at the premiere of Lionsgate's The Hunger Games: Mockingjay - Part 1 on Nov. 17 Photograph by Kevin Winter/Getty Images

When Hollywood began turning successful book franchises into blockbuster factories, production companies uncovered a lucrative little secret: The number of words need not limit the longevity of a movie series.

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