Totally not me anymore. I say do what you want. You want to watch the movie first. In fact, the movie can be a great intro to the story and when you go to read the book you'll have some great suprises.
Just take a second to look up the defamation before you use a word. << I think you mean 'definition' because 'defamation' means 'the action of damaging the good reputation of someone; slander or libel.