Gulliver's Travels, a 3-D film adaptation of Jonathan Swift's 18th-century satire, opens in theatres tomorrow. The movie may reignite interest in the 300-year-old novel, but those who pick up the book after enjoying the movie are in for a surprise: the Jack Black-starring film takes more than a few liberties with Swift's original story.

But this isn't the first case of a movie that veers dramatically from its source material. In the never-ending search for the next box office hit, Hollywood studios often turn to popular literature, betting that a recognizable story or name will draw audiences to movie theatres. Sometimes, however, those movies change so much in the transition from book to screen that it's hard to call them adaptations at all:

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