Watching a film adaptation of your favorite book is a risky business. This study focused on recent bestsellers, so you won’t find any Jane Austen or Charles Dickens titles in the results. There’s a 44 percent discrepancy between ratings for E.L. James’s explosively successful romance novel and the 2015 movie adaptation starring Dakota Johnson and Jamie Dornan. David Fincher’s 2014 take on Gillian Flynn’s Gone Girl, for example, was rated a single percent lower than the book. Is your least favorite film adaptation here?