The bull urged local authorities to cooperate with the inquisitors and threatened those who impeded their work with excommunication. Despite this threat, the bull failed to ensure that Kramer obtained the support he had hoped for, causing him to retire and to compile his views on witchcraft into his book "Malleus Maleficarum", which was published in 1487. The "Malleus" professed, in part fraudulently, to have been approved by the University of Cologne, and it was sensational in the stigma it attached to witchcraft as a worse crime than heresy and in its notable animus against women.