In his first-ever collaboration, New York Times bestselling author James Rollins combines his skill for cutting-edge science and historical mystery with award-winning novelist Rebecca Cantrell"s talent for haunting suspense and sensual atmosphere in a tale about an ancient order and the hunt for a miraculous book known only as... The Blood Gospel.After an earthquake in Israel reveals a tomb deep inside a mountain, a trio of investigators-a military forensic expert; a Vatican priest; and a brilliant archaeologist-set out to find a book rumored to have been written by Christ and said to hold the secrets to His divinity. But the enemy who hounds them is like no other, a force of ancient evil directed by a leader of impossible ambitions and incalculable cunning. The mysteries all lead back to a secret sect within the Vatican, a shadowy order called the Sanguines.