The Devil's Architect The Dark Horizon Trilogy, #2

Driven by unearthly visions, a convicted killer escapes from a maximum-security psychiatric hospital. Days later a woman is ritualistically murdered in the grounds of a mysterious London church. When a Roman coin is discovered under the victim's skin, Vincent Blake - London's leading stolen-art investigator - is called in to assist the police with their investigations.A series of copycat murders, all carried out within the vicinity of connected London churches rocks the heart of the city. As the body count rises, Blake is thrust into a race against time to solve a centuries-old mystery that sets him on a collision course with a terrifying secret.Nothing can prepare him for what he has to face, because the churches are not what they seem: they have been designed by the Devil's Architect.