This fourth and final volume mainly continues where Volume III left off.
This book continues to explore the areas the inquisition had influence
and the way it found out how heretics emerged and worked in the
respective fields the inquisition caught them in. Although the methods
were brutal and the victims often innocent, the inquisition shows how
thorough it was when dealing with these "sins." And then finally, Lea
shows us the steady decline of the inquisition after the wars of
Napoleon and how they tried to survive but failed.