A novelization (or novelisation) is a derivative novel that adapts the story of a work created for another medium, such as a film, TV series, stage play, comic book, or video game. Film novelizations were particularly popular before the advent of home video, but continue to find commercial success as part of marketing campaigns for major films. They are often written by accomplished writers based on an early draft of the film's script and on a tight deadline. Source: Wikipedia (en)