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Gravity's Rainbow is a 1973 novel by American writer Thomas Pynchon. The narrative is set primarily in Europe at the end of World War II and centers on the design, production and dispatch of V-2 rockets by the German military. In particular, it features the quest undertaken by several characters to uncover the secret of a mysterious device, the Schwarzgerät ("black device"), which is slated to be installed in a rocket with the serial number "00000".