Even though it’s usually a mistake (grin) … do movies made out of books make you want to read the original?
I fail to understand how it’s a mistake–isn’t it the assumption that the book is better than the film among readers, no matter if the story can be told better in a different medium? (Legally Blonde is such an example; I’ve heard that the original book is just poor, the film is fun, and I adore the musical.)
And yes, watching a film based on a book makes me want to read the book. I like seeing how people adapt things for the screen and how you translate a story to a different medium. For instance, Atonement focuses so much on the inner life of its characters that it’s very difficult to translate it well; you lose that by the sheer nature of a visual medium. Sometimes, the preview for the film is the first I’ve heard of the existence of the book, and so it serves as a book trailer for me.