The book was endorsed by several notable authors, including Clive Cussler, Nelson DeMille, Steve Berry, James Rollins, and Tess Gerritsen.

Jones are recruited to find Dr. Charles Boyd, an archeologist who recently found the Catacombs of Orvieto, the safe haven for the popes of the Middle Ages.

While Boyd avoids pursuit, a series of victims turn up dead, people who were tortured and crucified like Jesus Christ on his final day.

"[4] From Crime Squad (United Kingdom) — "In Sign of the Cross, Chris Kuzneski has created an entirely original world-view and tells us an extraordinary tale with one hell of a sting to it.

"[6] From Nelson DeMille — "Chris Kuzneski is a remarkable new writer, who completely understands what makes for a good story: action, sex, suspense, humor, and great characters.