The P.I. is hired by the daughter of a missing child psychiatrist being stalked by a man who insists that she knows where her father is.

"On the border between Maine and Canada, a dangerous smuggling operation is taking place. Drugs, cash, weapons, even people-- and something ancient and powerful and evil..."

"Still recovering from his life-threatening wounds, private detective Charlie Parker investigates a case that has its origins in a Nazi concentration camp during the Second World War. Parker has retreated to the small Maine town of Boreas to regain his strength. There he befriends a widow named Ruth Winter and her young daughter, Amanda. But Ruth has her secrets. Old atrocities are about to be unearthed, and old sinners will kill to hide their sins....

"It is deep winter and the darkness is unending. A private detective named Jaycob Eklund has vanished and Charlie Parker is assigned to track him down. Parker's employer, Edgar Ross, an agent of the Federal Bureau of Investigation, has his own reasons for wanting Eklund found. Eklund is no ordinary investigator--he is obsessively tracking a series of homicides and disappearances, each linked to reports of hauntings. Now Parker is drawn into Eklund's...

He is our best hope. He is our last hope. On lonely moor in the northeast of England, the body of a young woman is discovered near the site of a vanished church. In the south, a girl lies buried beneath a Saxon mound. To the southeast, the ruins of a priory hide a human skull. Each is a sacrifice, a summons. And something in the darkness has heard the call. But another is coming: Parker the hunter, the avenger. From the forests of Maine to the deserts...

"In Amsterdam, four bodies, violently butchered, are discovered in a canal house, the remains of friends and confidantes of the assassin known only as Louis. The men responsible for the murders are Serbian war criminals. They believe they can escape retribution by retreating to their homeland. They are wrong. For Louis has come to Europe to hunt them down: five killers to be found and punished before they can vanish into thin air. There is just one...