ՆկարագրումThe Hidden Staircase (1930) dust jacket, 1939B-29 printing.jpg	English: The Hidden Staircase (1930) dust jacket, 1939B-29 printing
Թվական	1939
Աղբյուր	AbeBooks (direct link)
Հեղինակ	Cover art by Russell H. Tandy
Այլ մեկնակերպներ	This file has an extracted image: The Hidden Staircase (1930) front cover, printing 1939B-29.jpg.

The back flap of the dust jacket is not shown in its entirety, so the lack of a copyright notice is not certain. However, at least three different dust jackets featuring the same cover art are known to be published without a copyright notice.

• Etsy (dust jacket)
• eBay (front cover, back cover and spine, front and back flaps)
• eBay (dust jacket)

Thus it is reasonable to assume that this dust jacket is published without a copyright notice.

This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. 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 (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties. العربية ∙ беларуская (тарашкевіца) ∙ čeština ∙ Deutsch ∙ Ελληνικά ∙ English ∙ español ∙ français ∙ Bahasa Indonesia ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ Nederlands ∙ português ∙ русский ∙ sicilianu ∙ slovenščina ∙ ไทย ∙ Tiếng Việt ∙ 中文（简体） ∙ 中文（繁體） ∙ +/−