“The Hammer of Witches” is the infamously known “manual for witch hunters” written by the monk Heinrich Kramer and the dean of the University of Cologne, Jacob Sprenger. The book was published in 1487 and went through 29 reissues, remaining equally popular throughout Europe, torn apart by religious schisms.
Most researchers lean toward the version that, with the help of this book, Heinrich Kramer tried to justify his own inquisitorial activities, which led to the burning of 200 women and the shameful expulsion of Kramer from the inquisitorial service for fanaticism and cruelty. The result turned out directly opposite to what was expected: in 1490 the inquisition—aimed at destroying heretics and religious free-thinkers—condemned the author himself.