In approximately 72-hours, a little known Middle Eastern terrorist group plans to bring about the end of the world - convinced that they are the descendents of angels. Central to their plan is the kidnapping of an undercover American scientist whose research has led him to an extraordinary secret: He is the keeper of a pair of mysterious stones whose origins are as old as time.

Original Spanish title: Ángel perdido. "Bestseller Javier Sierra presents a new historical enigma: a mysterious pair of 16th century stones used for communicating with God"