Offered here is a signed book: The Four Winners. NY: Devin-Adair Company, 1925. Hardcover, 5.25" x 7.5", 251 pages. Signed on the first free end page in fountain pen, “Sincerely, Knute Rockne.” In fine condition, with some weakness to the spine and a pencil notation and a touch of mild soiling to signed page, not affecting signature's fine appearance. Accompanied by a full Letter of Authenticity from PSA/DNA.