English: Image of the back cover of E.M. Hull's pulp fiction work titled 'The Sheik' (a "mapback" book). Published in 1921.
No copyright entry or renewal information from either Standford's database or Copyright.org - records. The sequel to this work, titled The Son(s) of the Sheik is copyrighted, as it was the inspiration for one or more films.
A google image search doesn't appear to show any relevant entries. Most images that appear on subsequent releases of this book, if any, appear to be images from the movie The Son of the Sheik in 1926.
I have an image of the inside title page, of the copyright notice, there is no mention of a cover-artist or copyright information pertaining to the cover art, or back cover art. Only MCMXXI - pertaining to 1921 for the discourse itself.
As Anonmoos commented on my talk page Dell mapbacks were published between 1943-51, also from Mapback entry, this would definitely fall prior to the 1964 copyright deadline.
Further the nature of the image, its simplicity, compared to other covers of the same book from a google search would lead me to believe that the cover was used only for the specific purpose of the book.
At this point I'm marking it as PD-US-not-renewed, unless otherwise challenged
Date
Source
George Kelley pulp fiction collection, University at Buffalo
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
{{Information |Description={{en|1=Image of the back cover of E.M. Hull's pulp fiction work titled 'The Sheik'. Published in 1921}} |Source=George Kelley pulp fiction collection, University at Buffalo |Author=E.M. Hull |Date=1921 |Permission= |other_versi