Brian Herbert books in order
19 books in the catalogue, about 197 hours of reading in all; the shortest takes 8 hours and the longest 14 hours.
2 series and 16 standalone books in the catalogue.
Heroes of Dune
2 books
The Caladan Trilogy
3 books 1 The Duke of Caladan length not known
2 
Dune: The Lady of Caladan 13.8 h 3 Dune: The Heir of Caladan length not known
Standalone books
Man of Two Worlds 7.8 h 
Hunter's Moon & Other American Gothic Tales 9.7 h 
Sandworms of Dune 10.0 h 
Dune House Corrino 11.2 h 
Avant Dune, Tome 2 12.3 h 
House Corrino 11.9 h 
The Butlerian Jihad 11.4 h 
The Machine Crusade 12.3 h 
Le Jihad Butlérien - Dune, la Genèse - Tome 2 12.6 h 
The Battle of Corrin 11.4 h 
The Road to Dune 8.5 h 
Hellhole 9.7 h 
Sisterhood of Dune 10.4 h 
Mentats of Dune 8.2 h 
Navigators of Dune 8.2 h 
Infinite Stars 9.9 h