Over a career that spanned three decades, Frank Herbert wrote some nearly 30 books. Sadly, with the exception of his six-volume contribution to the Dune saga, every one of these works is out of print.
The Dune series
1. Dune - 1965
2. Dune Messiah - 1969
3.Children of Dune - 1976
4.God Emperor of Dune - 1981
5.Heretics of Dune - 1984
6.Chapterhouse: Dune - 1985
Other novels
The Dragon in the Sea (a/k/a Under Pressure) - 1955
The God Makers - 1960
The Eyes of Heisenberg - 1966
The Green Brain - 1966
Destination: Void - 1966
The Heaven Makers - 1968
The Santaroga Barrier - 1968
Whipping Star - 1970
Soul Catcher - 1972 (non-SF)
Hellstrom's Hive - 1973
The Dosadi Experiment - 1977
The Jesus Incident - 1979 (with Bill Ransom)
Direct Descent - 1980
The White Plague - 1982
The Lazarus Effect - 1983 (with Bill Ransom)
The Man of Two Worlds - 1986 (with Brian Herbert)
The Ascension Factor - 1988 (posthumous, with Bill Ransom)
Collected short works
The Worlds of Frank Herbert - 1970
The Book of Frank Herbert - 1973
The Priests of Psi - 1980
Eye - 1985
Nonfiction
Survival and the Atom - 1952
New World or No World - 1970
Threshold: The Blue Angels Experience - 1973
Without Me, You're Nothing: An Essential Guide to Home Computers - 1980 (with Max Barnard)
The Maker of Dune - 1987 (posthumous, edited by Timothy O'Reilly)
The Notebooks of Frank Herbert's Dune - 1988 (posthumous, edited by Brian Herbert)
Related books: About Herbert and Dune
Frank Herbert - 1980 (David M. Miller)
Frank Herbert - 1981 (Timothy O'Reilly)
The Dune Encyclopedia - 1984 (Willis McNelly)
Dune Master: A Frank Herbert Bibliography - 1988 (Daniel Levack)
Dune: House Atreides - 1999 (Brian Herbert and Kevin J. Anderson)