Libraries buy the books and pay a royalty to whoever owns the rights. In some cases this is based on a voluntary contract and in some it is based on a public l

Libraries buy the books and pay a royalty to whoever owns the rights. In some cases this is based on a voluntary contract and in some it is based on a public lending right. https://en.wikipedia.org/wiki/Public_Lending_Right https://en.wikipedia.org/wiki/Public_Lending_Right