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"To Kill a Mockingbird" will not be Harper Lee's only published book after all.
Publisher Harper announced Tuesday that "Go Set a Watchman," a novel the Pulitzer Prize-winning author completed in the 1950s and put aside, will be released July 14.
Rediscovered last fall, "Go Set a Watchman" is essentially a sequel to "To Kill a Mockingbird," although it was finished earlier. The 304-page book will be Lee's second, and the first new work in more than 50 years.
"The existence of 'Go Set a Watchman' was unknown until recently, and its discovery is an extraordinary gift," Harper publisher Jonathan Burnham said in a statement.
"To Kill a Mockingbird" is among the most beloved novels in history, with worldwide sales topping 40 million copies.