A letter signed by Alabama author Harper Lee regarding her award-winning book "To Kill a Mocking Bird" has been sold at auction for $9,518.

Nate D. Sanders Auctions of Los Angeles says the typed letter was sold Tuesday.

In the letter, Lee responds to a fan who asked where the book's Maycomb County is located. She tells the fan that the county is in her heart.

The letter was written in 1960 and includes a hand-drawn outline of Alabama with Maycomb County written across the north central part of the state.