<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (August 2016) (Learn how and when to remove this template message) </Td> </Tr> <P> A public domain book is a book with no copyright, a book that was created without a license, or a book where its copyrights expired or have been forfeited . Every book and tale written prior to 1923 (or 1947 in most countries) is in the public domain, among them, every book written by Jane Austen, Lewis Carroll, Edgar Allan Poe and H.G. Wells . </P> <P> Music has been created and played by humans for millennia . An object identified as a possible flute (the Divje Babe Flute) is more than 40,000 years old . Even if humans had musical instruments and made music there was a need for a musical notation system to be able to preserve song through writing . The first such system, the Music of Mesopotamia notation system, was created 4000 years ago . In the 10th century Guido of Arezzo introduced Latin musical notations . All this laid the foundation for the preservation of global music belonging to the public domain since the beginning of musical history to the present . </P>

When does a book enter the public domain
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