. "''Dune'' prequel" . . . "Dune prequel series#Great Schools of Dune" . . . . . . "Heroes of Dune" . . "Dune prequel series" . "''Dune'' prequels" . . . "Dune prequel series#Legends of Dune" . . . . "Prelude to Dune" . . "''Dune'' prequel series" . . . . "Dune prequel series#Heroes of Dune" . "prequel series" . . . . "Dune prequel series" . . . . . . "Dune prequel series#The Caladan Trilogy" . . . . "13 prequel novels" . . "Dune prequel series#Prelude to Dune" .