Authors who have published a unique creative literary work generally want to protect the rights to their book. Copyright protection laws give authors rights to limit how others may use their creative work, limiting others from copying or producing derivative works of copyrighted material. The characters and story lines of an authors unique creative work are protected under copyright laws, and unauthorized sequels written by third parties are generally not allowed. There are exceptions allowed for parody, however, and fair use laws allow for the quoting of copyrighted work with proper attribution. Book copyright protection does not allow books to be copied and posted online. Depending on a specific author's contract, either the publishing house responsible for the book's distribution or the individual author may legally own the copyright to a book. Both publishers and authors regularly file infringement suits against those who have unlawfully used copyrighted material, often winning large monetary settlements or injunctions stopping the infringing act.