I could have just said movies that were made because of books.  But I like the idea of "visual books" better. ;)  Tonight I watched for the first time Harry Potter and The Sorcerer's Stone after having read the book last month for the first time.  And while I liked the book better than the movie I still appreciate having the movie to give me some visual of the what I read.  I loved seeing The Help after reading the book.  I have loved watching Agatha Christie books come to be in movie form, etc.  You get the idea.  I'm a very visual person and to see an interpretation of the characters and the story line come to to life (even if I don't exactly agree with the interpretation) is fun and something I am actually grateful for.