Book has an invalid notice (fails to list the claimant). Per the Jaws cover ruling, a book cover needed a separate notice. There is not a notice for the cover on the inside, back, or front of the book. A search in the copyright registration catalog returns a registration for the book contents prior to its publication, but not the cover.
Licensing
Public domainPublic domainfalsefalse
This work is in the public domain because it was published in the United States between 1978 and February 1989, inclusive, without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art after 1977.
Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (70 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.
Uploaded a work by "Gaetan Delaforge", published by Threshold Books. from https://www.amazon.com/Templar-Tradition-Age-Aquarius/dp/0939660202, cropped and slightly touched up by me. with UploadWizard