Archangel

The Secret of the Golden Library

The execution of a Vatican archivist in the shadow of the Kremlin reveals a conspiracy with roots stretching back several centuries – to the bloody era of the Russian tsars. Before his death, the archivist manages to send an encrypted message: a warning of a terrifying threat connected to a secret hidden within the tsars' Golden Library. As the intelligence community tries to uncover the truth about the man's death and his dangerous discovery, Sigma Force is called in. They are tasked not only with finding the lost treasury of ancient books but also with following a trail to the Arctic, to a lost continent, and to a revelation that could disrupt the world's already fragile balance of power. However, Sigma is also dealing with its own troubles: weakened and vulnerable after a bomb attack on the National Mall, beneath which its headquarters are located. The unfolding events – on Russian soil and deep in the Arctic – reignite a centuries-old conflict between the Russian Orthodox Church and the Vatican, and countries along the Arctic Circle are preparing for a war that could turn the icy seas into a fiery hell. Although Commander Grayson Pierce and Sigma Force face enemies on all sides, they must solve a thousand-year-old mystery and uncover the truth about a lost civilisation and a mysterious treasure that could either save the planet or destroy it.
The Archangel is Rollins's eighteenth novel in the Sigma Force book series, which critics have acclaimed as "top-tier popular fiction."