Frank Herbert, who created the Dune universe, only wrote six of the books himself: Dune, Dune Messiah, Children of Dune, God Emperor of Dune, Heretics of Dune and Chapterhouse: Dune.

Dune 15. Paul of Dune 16. Dune Messiah 17. The Winds of Dune 18. Children of Dune 19. God Emperor of Dune 20. Heretics of Dune 21. Chapterhouse: Dune 22. Hunters of Dune 23. Sandworms of Dune ...

5. Heretics of Dune (1984) - Dune Book #5 The fifth book in the original series picks up 1,500 years after the death of Leto II.