SAN FRANCISCO – On Oct. 6, PBA Galleries will offer a first printing of Harper Lee’s To Kill a Mockingbird. The 1961 Pulitzer Prize Award-winning book is inscribed and signed by the author and is in an unrestored dust jacket. The lot is accompanied by a letter from the author to the person who requested the signing of the book for his son. It is expected to sell for $20,000 to $30,000.