There Are 6 "Dune" Books in the Series — Here Are Their Plots in Order

The "Children of Dune" ($10) refers to twin siblings Leto and Ghanima Atreides, the children of Paul, who disappeared nine years ago. Like their father, the twins possess supernatural abilities, but their aunt Alia currently rules in their father's place. As dissent threatens to steal her throne, she believes that unlocking the twins' power will help her maintain control of her empire.