Hi Keren... The copyright of a work, as far as I know, is based on the date of publication and may vary depending on national laws. In the case of a 1906 book, copyright protection typically lasted 28 years with the possibility of renewal for another 67 years, leading to a maximum of 95 years. So, in 2024, a book from 1906 should be in the public domain, as more than 95 years have passed since its publication.
However, in your example, if on the company page it is listed as published in 1923, then the copyright protection would be based on this date. In this case, the book would still be under copyright until 2018 (95 years since its 1923 publication).
As for the term "public domain", it refers to creative works, such as books or works of art, that are no longer protected by copyright and can be freely used by the public. Copyright laws vary, but in general, when a work enters the public domain, it can be reproduced, distributed, and used without the need to obtain permission from the copyright holder.
Copyright laws can be complex and subject to change, so it is always best to consult a legal expert for specific, up-to-date details.
You can find more information on this site: https://www.copyright.gov/registration/literary-works/
