Thud! is Terry Pratchett's 34th Discworld novel, released in the United States of America on September 13 2005, the United Kingdom on October 1 2005, and may have been released before that date in other countries, such as Norway and Denmark. Thud! was released in the U.S. three weeks before it was released in Pratchett's native UK, to coincide with a United States signing tour.