There are basically two reasons why, from the earliest days of the film industry, books have been used as the basis for the narrative structure of greats films1. The first is that a novel is one view for testing the market, for verifying in advance the success of a story. The second reason is aesthetic: movies and books share many common features such as plot structure, characters, and tone. Adaptations can be tricky and do not always result in artistic and/ or commercial success. There are thousands of examples of writers who are upset about how the film transformed their material. There are also plenty of stories about writers who gave up the rights to their work and, despite being paid a lot of money, loudly regretted it.