This book is a new translation of one of two tomes written by Girolamo Menghi, master of the art of exorcism during the renaissance. The other has, so far, yet to be translated into English.
"The Devil's Scourge" is a manual for conducting exorcisms, listing seven different kinds, each useful depending on the circumstances of each individual "encounter". Menghi's manual provided the Catholic Church with some excellent tools in its medieval war against supernatural evil, only to fall out of favour in later generations. It was eventually placed on the index of works prohibited by the Vatican.
This book is invaluable for the glimpse it gives us into the mindset of renaissance exorcists and demonologists. Read in conjuction with Del Rio's "Investigations Into Magic" and the new translation of "The Malleus Maleficarum", it provides a fuller picture for any serious student of the subject. That Menghi was considered the leading exorcist of his time is attested to by the fact that Del Rio cites his work as a reference in his own masterpiece - high praise indeed.
This translation cannot be faulted and the essay bundled with it is a nice and useful addition and is well worth reading in itself. I'm now just waiting for a translation of Menghi's "Fustis" by the same writer...