Over the course of the series he clashes several times with "the Dark Lord" and experiences countless adventures with his two best friends. The movie didn't include some small details or even some bigger details, but these are the few I'd like to share, even though most won't affect the overall experience of the story. At the beginning of the book Harry begins receiving countless letters from Hogwarts School of Witchcraft and Wizardry. His Uncle Vernon was fed up with the letters because he didn't want to acknowledge that magic was actually real. Vernon moved Harry to many different places in the house, because the letters were extremely precise. This didn't work, so that's when they left the house to a different location. In the film, however, Harry never changes rooms, he stays under the stairs for the entire beginning. This isn't very important, if I'm honest, but it's a small detail that I found strange because the film didn't show, to the same extent, how excessive the letters became. On a bigger note, the