Discworld stamps are a series of artistamps which are directly mentioned or strongly implied in the Discworld novels by Terry Pratchett. In the Discworld fiction the stamps are printed by fictional Ankh-Morpork firm, Teemer and Spools, for the Ankh-Morpork and other regional Post Offices. They were first introduced in the book, Going Postal, as an invention by the then postmaster, Moist von Lipwig. The stamps have become collectors items among fans of the Discworld novels, and were featured in Stanley Gibbons' stamp and stamp memorabilia magazine.