"As well-versed in politics, pop culture, and crime fiction as he is ill-fated in life, Jack Taylor is recovering from a mistaken medical diagnosis and a failed suicide attempt. In need of money, and with former cop on his resume, Jack has been hired as a night-shift security guard. But his Ukrainian boss has Jack in mind for a bit of off-the-books work. He wants Jack to find what some claim to be the first true book of heresy, The Red Book, currently...

Galway private investigator Jack Taylor confronts an evil coterie named Headstone, who have committed a series of random, insane, violent crimes in Galway, Ireland.

Seems impossible, but Jack Taylor is sober--off booze, pills, powder, and nearly off cigarettes, too. The main reason he's been able to keep clean: his dealer's in jail, which leaves Jack without a source. When that dealer calls him to Dublin and asks a favor in the soiled, sordid visiting room of Mountjoy Prison, Jack wants to tell him to take a flying leap. But he doesn't, can't, because the dealer's sister is dead, and the guards have called it...

Juggling a precarious balance between his physical and addiction recovery efforts, former cop Jack Taylor investigates the work of a vigilante killer who has been sending him cryptic invitations to join him, an effort that jeopardizes Taylor's livelihood, friends and mental health.