The Perks of Being a Wallflower (novel)
The book was adapted into a movie in 2012, having Stephen Chbosky direct it and starring Logan Lerman as Charlie, Emma Watson as Sam and Ezra Miller as Patrick. Although the plot of the movie shows many similarities to the novel, it has some clear and distinctive differences. For example, in the movie, Charlie helps Sam with schoolwork to improve her grades, but this is not mentioned in the novel. And the side-story about Charlie’s sister getting pregnant is only in the book, not in the movie.