The Palestinabuch (Book of Palestine), also Palestina Buch, Palästinabuch or Palästina Buch, is an allegedly lost manuscript by the German-Dutch historian and antisemite Herman Wirth (1885–1981), founder of the German Ahnenerbe, which its adherents claim would have changed the world if it had not disappeared. The myth plays a part in antisemitic theories maintaining that the Ashkenazi Jews descend largely or entirely from the Khazars or from Central Asia.