Children of Dune (Dune 3)

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 Fremen are being provoked into open revolt by the enigmatic figure known only as The Preacher. Alia believes that by obtaining the secrets of the twins’ prophetic visions, she can maintain control over her dynasty.
But Leto and Ghanima have their own plans for their visions–and their destinies….