One morning the residents of Walden, Virginia, woke up to find the rest of the world gone. Just . . . gone. Surrounding their town was a wall of inky darkness, plummeting Walden into permanent night. Nothing can get in - not light, not people, not even electricity, radio, TV, internet, food, or water. And nothing can get out. No one who dared to penetrate the mysterious barrier has ever been seen again. Only their screams were heard. But for some, the darkness is not the worst of their fears. Driven mad by thirst, hunger, and perpetual night, the residents of Walden are ready to explode. The last few sane prisoners of this small town must prepare a final stand against their neighbors, themselves, and something even worse . . . something out there . . . in the darkness .

Can you commit the perfect crime? Pilgrim is the codename for a man who doesn't exist. The adopted son of a wealthy American family, he once headed up a secret espionage unit for US intelligence. Before he disappeared into anonymous retirement, he wrote the definitive book on forensic criminal investigation. But that book will come back to haunt him. It will help NYPD detective Ben Bradley track him down. And it will take him to a rundown New York hotel room where the body of a woman is found facedown in a bath of acid, her features erased, her teeth missing, her fingerprints gone.

It is a textbook murder - and Pilgrim wrote the book. What begins as an unusual and challenging investigation will become a terrifying race-against-time to save America from oblivion. Pilgrim will have to make a journey from a public beheading in Mecca to a deserted ruins on the Turkish coast via a Nazi death camp in Alsace and the barren wilderness of the Hindu Kush in search of the faceless man who would commit an appalling act of mass murder in the name of his God.