According to the American Library Association (ALA), a challenge is an attempt to remove or restrict materials, based upon the objections of a person or group. A banning is the removal of those materials. Challenges do not simply involve a person expressing a point of view; rather, they are an attempt to remove material from the curriculum or library, thereby restricting the access of others. As such, they are a threat to freedom of speech and choice.
Banned Books Week is an annual event celebrating the freedom to read and the importance of the First Amendment. Held during the last week of September, Banned Books Week highlights the benefits of free and open access to information while drawing attention to the harms of censorship by spotlighting actual or attempted bannings of books across the United States.
Intellectual freedom -- the freedom to access information and express ideas, even if the information and ideas might be considered unorthodox or unpopular -- provides the foundation for Banned Books Week. The week stresses the importance of ensuring the availability of unorthodox or unpopular viewpoints for all who wish to read and access them.