Which Books Did No One Know About Until the Movie?

Forrest Gump 1 of 16

Everyone's image of Forrest Gump involves a lanky Tom Hanks, but in the original 1987 novel, he is an overweight fella that Hanks would have never been cast as. Even though there are huge character and plot differences, the original 'Forrest Gump' book became a huge hit after the release of the 1994 film.