Lee took the book world by storm in 1960 when the book on racialinjustice in Alabama was published, and then went on to win thehighest accolade of American literature - the Pulitzer Prize.
Atticus Finch the powerful protagonist of To Kill a Mockingbird wasbrought to life in the 1962 film by actor Gregory Peck, inspiringsome fans to become lawyers and others to join the fight for civilrights or become teachers and social workers.
Finch stood tall for generations of American readers, lawyers andfilmgoers as a rebel against the rampant racism of the US South inthe 1930s.
Lee once declared that it would be her only novel.
But last year, some 55 years after To Kill a Mockingbird, her secondnovel, Go Set a Watchman, was published.
Lee completed Go Set a Watchman in the 1950s, but it was put asideuntil the manuscript was rediscovered by her friend and lawyer, TonjaCarter, at a "secure location" in the autumn of 2014, publishersHarperCollins said last year in a statement.
"After much thought and hesitation I shared it with a handful ofpeople I trust and was pleased to hear that they considered it worthyof publication," Lee said in that statement.
Lee, who still lived in Monroeville, had a stroke in 2007, but fullyrecovered from it, according to Al.com.