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Description:  The twenty-second Discworld novel by Terry Pratchett. First published in 1998, it mocks the aspects of time travel such as the grandfather paradox and the Ray Bradbury short story "A Sound of Thunder". It also parodies Australian people and aspects of Australian culture, such as the Crocodile Dundee, The Adventures of Priscilla, Queen of the Desert and Mad Max movies, the Australian beer XXXX, Vegemite, thongs, cork hats, the Peach Melba, and the popular Australian songs "Waltzing Matilda" and "Down Under".