The Magic Sword

The most unexpected novel about a "transported-to-another-world" hero, breaking the narrow bounds of the genre! Our contemporary in a wild, warlike world on the border between the Stone and Bronze Ages, where modern knowledge and skills turn out to be completely useless, and the visitor from the future is so helpless and worthless that the primitive tribe that shelters him "awards" the outsider a contemptuous nickname that can be translated as IDIOT.
And he would have languished in this shameful role of an "omega" male, dragging out a miserable existence and bidding farewell to hope of returning home—had an enemy horde not attacked his tribesmen, far more advanced, having mastered bronze weapons and riding skills. And if in peaceful life the knowledge of the 21st century is of no use to anyone here, then after the tribe's defeat the "transmigrant" finally gets a chance. Will he manage to pass himself off as a shaman and prophet? Will fragmentary knowledge of military history help in a prehistoric war? How can he gain possession of the local "wunderwaffe"—the Magic Sword, made not of bronze but of meteoric iron? What dangers will he have to go through in order to crush the horde and finally get rid of the "idiotic" nickname?