Nicolas Eymerich - The Inquisitor - Book 1 : The Plague

A will of steel, a heart of stone, intelligence as sharp as a knife, and wisdom as deep as oblivion. Eymerich is called upon to investigate an obscure case. Something that goes way beyond heresy, revealing a new face of Evil. He must tackle a great number of arduous tasks and make many painful choices. Terrible creatures await him, but with his burning determination he will overcome a Plague that is deadlier than his worst possible nightmare.