Books have always been a popular source of material for films. Novels often contain intricate details and sub-plots that are often found in the cutting room floor to accommodate a movie's average two-hour runtime. As more often than not, the book is more superior than the film adaptation in many ways.
Sometimes, a film bucks the trend and improves upon the original text. Whether the film's director made all the right creative decisions, or an actor portrays a character in ways even the author hadn't imagined, these films surpassed their literary sources and sometimes convinced audiences that the book never existed!