Mickey Mantle signed these three NRMT copies of his 1985 autobiography "The Mick" like he meant it. NRMT autographs on the title page all read: "Thanks, Mickey Mantle." You can compare the handwriting with the way he signs off at the end of the book. In the book, Mantle glossed over the alcohol problems that contributed to his death, but his appreciation of fans was always sincere. His autographs have seen a steady rise in value.