The good thing about making a movie based on a book is that the foundation is already there. The not-so-good thing is when the film doesn't follow the book closely enough for viewers ('My Sister's Keeper'), leaves viewers wanting more ('The Men Who Stare at Goats'), or just plain doesn't translate well to the big screen ('Angels & Demons').

But even condensed into a meager two hours, there are plenty of films that do measure up, either in full or enough to make our list of the top 10 film adaptations of 2009. See if you agree with our choices, and feel free to add your own in the comments below.