Pride and Prejudice is one of those books that everyone has read at one point in their academic careers, I think. Austen is a great writer, and Pride is probably her best known work. I know I had to read it once in high school, and while I liked it, it didn't leave that much of an impression on me.
That's not true for other people, judging from the mountain of profession fanfiction in the market today. You could read the entire thing from Darcy's perspective. (the cleverly titled Darcy's Story
) You could read what happens if the book's timeline was changed. (Mr. Fitzwilliam Darcy: The Last Man in the World is just one example.) You could even see Elizabeth fight against the zombie hordes. (the nerd-ification masterpiece Pride and Prejudice and Zombies) There are literally dozens of books that try to continue, alter, and play with Austen's original story, at least according to Wikipedia, and we should always trust Wikipedia.