This is an image from a book dust jacket first published in the United States under the US Copyright Act of 1909 (active July 1909 to December 1977) without a copyright notice on the book jacket. Per the 1973 Compendium of US Copyright Office Practices 4.3.1.II.d and 4.4.3.IV, removable dust jackets are treated as separate works from the books they cover. Per the US Copyright Office's 2014 Jaws Illustration case, book cover images require their own copyright notices distinct from that of the book author's.