* Censorship: Books have been censored for a variety of reasons throughout history, including political, religious, and moral reasons. In some cases, books have been banned outright, while in other cases they have been censored by removing or altering certain passages.
* Burning: Books have also been burned throughout history, often as a way of destroying harmful or subversive ideas. Some of the most famous examples of book burning include the burning of the Library of Alexandria in ancient Egypt and the burning of books by the Nazis in the 1930s.
* Digital piracy: In recent years, digital piracy has become a major challenge for books. Digital piracy refers to the unauthorized copying and distribution of digital content, including books. Digital piracy can make it difficult for authors and publishers to make money from their work, which can lead to a decline in the production of new books.
* Lack of access: In many parts of the world, people do not have access to books. This can be due to a variety of factors, including poverty, lack of infrastructure, and government censorship. Lack of access to books can limit people's ability to learn and grow, and can contribute to social inequality.