"Banned Books Week is an annual event celebrating the freedom to read. Typically held during the last week of September, it highlights the value of free and open access to information. Banned Books Week brings together the entire book community –- librarians, booksellers, publishers, journalists, teachers, and readers of all types –- in shared support of the freedom to seek and to express ideas, even those some consider unorthodox or unpopular." -- ALA Banned Books Week
Challenge: "An attempt to remove or restrict materials, based upon the objections of a person or group.
Banned: Removal of 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. Due to the commitment of librarians, teachers, parents, students and other concerned citizens, most challenges are unsuccessful and most materials are retained in the school curriculum or library collection." -- ALA About Banned & Challenged Books