Absalom Under A False Flag

"Inspector Harry Absalom is an old-school copper - curmudgeonly anti-authoritarian, he's been with the force for over forty years. Suffering from an inoperable cancer, he's also the head of a special squad that enforces The Accord, a diplomatic treaty made in the sixteenth century between the throne of England and the powers of Hell. Together with the psychotic Guv'nor, Harry uncovers a secret demon-killing cadre working on behalf of the church."