The Original Saga

Frank Herbert

1.  Dune
2.  Dune Messiah
3.  Children of Dune
4.  God Emperor of Dune
5.  Heretics of Dune 
6.  ChapterHouse Dune

7.  Hunters of Dune (Brian Herbert & Kenneth J. Anderson, June, 2007)

8.  Sandworms of Dune (Brian Herbert & Kenneth J. Anderson, August, 2007)

The Dune Prequels

Brian Herbert and Kenneth J. Anderson

1.  House Atreides
2.  House Harkonnen
3.  House Corrino

The Legends of Dune Trilogy
Brian Herbert and Kenneth J. Anderson

1. The Butlerian Jihad
2. The Machine Crusade
3. The Battle of Corin

Others

The Dreamer of Dune – a biography of Frank Herbert

The Road to Dune