10 sequels based on a classic book

P.D. James' "Death Comes to Pemberley" – set in the fictional world of Jane Austen's "Pride and Prejudice" – was a critics' darling and one of 2011's great word-of-mouth literary successes. It was also one more example of a sequel based on an older classic. Many authors have taken a beloved fictional work and written a sequel – or sometimes a prequel – based on their imaginings of what might have happened outside the pages of the original. Some had permission from the author (or more often, the author's estate), and some didn't. Some got great reviews – and some didn't. Here are 10 novels based on famous literary works written by other people.