Hot dog!!! This news just made my day!!
This fabulous news of a sequel is from today's VARIETY! Please click the link to read the entire article!It seems that the sequel, GO SET A WATCHMAN, is set twenty years after we leave Scout and her father in TO KILL A MOCKINGBIRD, when Scout, now grown and living in NY, returns home to see her father. TO KILL A MOCKINGBIRD was originally published in 1960.
Here's one of the many covers of the book.
Bookcover image copyright: Harper Perennial Modern Classics.