Brimstone Pendergast Series, Book 5.

Art critic Jeremy Grove is found dead, his face frozen in a mask of terror. His body temperature is grotesquely high; he is discovered in a room barricaded from the inside; the smell of brimstone is everywhere...and the unmistakable imprint of a claw is burned into the wall. As more bodies are discovered - their only connection the bizarre but identical manner of death - the world begins to wonder if the Devil has, is fact, come to collect his du...