Books vs. Movies

What's your favorite book turned movie? Right now I'm reading the A Song of Ice and Fire series which HBO has now turned into the Game of Thrones TV series. However, I think my favorite book that was made into a movie is Into the Wild by Jon Krakauer. I am a big fan of Krakauer's. Sometimes movie renditions of books are awful! What are your suggestions of good movies based on books?

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