Two ancient relics have been stolen from the Catholic Church. One has the power to unite, but the Templars fear the other has the power to destroy. When Jonathan Rose is walking his dogs on a beach in Scotland, a voice from his past makes contact again. Fearing the worst, St Clair, the Grand Master is forced to send the Templars into battle again, but now they face two mortal foes. Fighting on two flanks and against the mysterious powers of the occult, the Templars must trust their faith to defeat a traitor at the very heart of the Church. Only then can they hope to win against their eternal enemy. Perdition is the third book in the templar thriller series.