The Harry Potter books have been adapted into movies. Eight movies out of 7 books, and the most loyal to the book have been the last two movies, Deathly Hallows Parts 1 & 2. The essence of the book is maintained throughout the movie for the most part. They kept most of the nitty-gritty details in the movie, for example Bill's werewolf lineaments, when 6 of the order members take polyjuice potion to impersonate Harry and the exhaustive search for the horcruxes that all readers believe was just a filler so the book didn't just have 100 pages was equally long and tedious in the movie. The problem with the Deathly Hallows is that most of the details of Lily and Snape's relationship were left out. In the movie we never see the letter that Lily wrote to Sirius and Harry finds torn in half, and later find out Snape took, we don't see that Snape had an argument with Lily about him wanting to be a Death Eater and treating her like she wasn't a "mudblood" and that was what caused the animosity between them, despite the fact that they loved each other. Despite the differences the movie does receive the feat for being the best (2) Harry Potter movies of the series.