Malius Malifacalum - The Hammer of the Witches

Malius malificarum is a kind of like a best selling book. It's second only to the bible in terms of sales. Was written by a german dominican monk called heinrish crammer. Argued that witches existed, basically, and that they worked for the devil. And it gave you tips on how to find them and how to exterminate one of the key things that makes it important is that he reproduces a papal borsan ordered by the pope at the beginning of the book.