What would you guys say are some of the best screenwriting books that exist in terms of developing really strong complex unique characters? Is there anything that you feel is lacking in terms of the current books on the market? Are there any books that you've used to help create/develop your films that led to successes? I know someone who is working on developing a book that will help writers create multi-layered characters in a simple fun way and she is looking for some feedback from the writing community. Thanks everyone!!!