Children of Dune

Book Three in the Magnificent Dune Chronicles—the Bestselling Science Fiction Adventure of All Time
Nine years ago Emperor Paul Muad'Dib disappeared into the desert wastelands of Arrakis. Now, his twin children—Leto and Ghanima Atreides—are being groomed to become Messiahs. Like their father, the twins possess supernormal abilities, making them valuable to their manipulative aunt Alia, who rules the Empire in the name of House Atreides.
Facing treason and rebellion on two fronts, Alia's rule is not absolute. The displaced House Corrino is plotting to regain the throne while the fanatical Fremens are being provoked into open revolt by the enigmatic figure known only as The Preacher. By obtaining the secrets of the twins' prophetic visions, Alia believes she can maintain control over her dynasty.
But Leto and Ghanima have their own plans for their visions—and their destiny...