The Eighth Day by John Case
"And on the Seventh Day, He rested." --Genesis, 2:2-3 The EighthDay is an explosive, compulsively readable novel of suspense that plunges a clever young man into a web of mystery and international deceit, bringing him face to face with the ultimate evil. Danny Cray is a struggling 28 year-old sculptor and video artist who lives in Washington DC. To make ends meet, he does occasional freelance work as a researcher for a large firm of private detectives. When one of their most powerful clients approaches him with a job, the money is too good to resist. All he has to do is learn what a recently deceased university professor was working on when he died.
But Danny stumbles on far more than he expected when he discovers that the professor was in touch with the Vatican about a remote tribe of Kurds who worship the Peacock Angel; Satan. After others connected to the professor start to disappear, Danny finds himself in great peril and must travel into the ancient land where this tribe still lives in order to discover what is truly at stake in his investigation. A mesmerising blend of science, religion, history and suspense, The Eighth Day confirms John Case's position as a master of intelligent commercial fiction.