I was just going to post that I'd accept the title in Latin or English, but then you go and give me both. Well done, sir.
The answer I was looking for was indeed the Malleus Malificarum, the Hammer of Witches, written at the request of Pope Innocent VIII. It was written to attempt to prove the real threat of witchcraft to sceptical authorities, to explain why more women were witches than men, and to instruct on how to recognise and convict witches.
Its significance is disputed, as it was not read very widely in protestant areas, whereas these same areas sometimes saw the most violent hunts of all Europe. I could write a short essay on this, but this ain't the place for it. Unfortunately.
Go, Fenix!
