Abruzzo, Italy: a young priest suffers the stigmata of the crucifixion.

The Vatican, Rome: the Pope calls on Harvard professor Cal Donovan to investigate the truth of the priest’s claim.

Berlin, Germany: a neo-Nazi organisation believes the priest is the key to an earth-shattering secret. A secret that can be used as a deadly weapon.

When the priest is abducted, a perilous race against the clock begins. Only Cal can track down the ruthless organisation and stop it, before an apocalyptic catastrophe is unleashed.

⭐️⭐️⭐️⭐️⭐️ What Readers are Saying:

“Cal Donvan s exploits are an excellent read. Sign of the cross just keeps you going till your finished. I would recommit any of Glenn Cooper’s books.” Amazon Review

“I’m fascinated by the artifacts and history woven through the story. I like the main character Cal. The priest and his family were touching. And the mystery was top notch.” Amazon Review

“Best read in a very long time! Moved fast and very plausible.” Amazon Review