There are no copyright notices on the dust jacket.
Using the search term "Night Shift" and looking at the year of publication of the dust jacket, 1978, we see that there are two possibly relevant copyright registrations, TX0000018451 and TX0000041007. However, both of them refer to the literary work and not the dust jacket. Thus there are no copyright registrations for the dust jacket.
Thus the entire dust jacket is in the public domain in the US.
Public domainPublic domainfalsefalse
This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years.
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 (50 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.