In a rare public statement released through her publisher, HarperCollins, Lee said: "I'm still old-fashioned. I love dusty old books and libraries. I am amazed and humbled that Mockingbird has survived this long. This is Mockingbird for a new generation."
First published in July 1960, Mockingbird has sold more than 30 million copies worldwide, and that total is climbing by more than 1 million copies a year, according to HarperCollins.
Lee never published another book, which only seemed to add to the novel's appeal, and for decades she has resisted interviews and public appearances.
However, from July 9, the day after Nelle Harper Lee's 88th birthday, she is giving readers around the world the gift of being able to read or listen to this extraordinary story in all formats.