A book-to-movie adaptation is always a gamble of whether it will be fairly faithful or make editorial changes that make sense. When the 2013 movie, The Mortal Instruments: The City of Bones (based on the book by Cassandra Clare of the same name) came out, the movie definitely received mixed reception from fans. Some were grateful a movie got made at all, some were mad about the changes made and thought it was a bad movie, and some thought it wasn't half bad. You can make your decision until January 31 if you have Netflix, because that's when it's set to leave the streamer.