Givry continued the medieval propaganda against Witchcraft and it took it a step further, as he considers that the art around witchcraft and magic depicts reality. Yes, you are not crazy, this is what he considers. So, previous writers considered that confessions (sic) of witches were real, he considers that painting depicted the truth. So, the book is full of very nice illustrations, which are commented by the author.
A catholic and a mason, who continues the Christian propaganda in the 20th century. Total loss of time and money, unless you are interested in the arguments of that side.