This is my master list of e-book availability for Frank Herbert’s works (current as of the beginning of 2015), as seen as a customer in the United States.
I’ll try to keep this list updated periodically, but if you notice anything missing or a broken link, please let me know.
I used this bibliography from Wikipedia to compile this list.
WorShip aka Pandora Novels: The first two books in the series have been released as e-books by Kevin Anderson’s WordFire Press. Note: Books 2-4 are co-authored with Bill Ransom.
The Dragon in the Sea
The Green Brain
The Eyes of Heisenberg
The Heaven Makers
The Santaroga Barrier
The White Plague
Man of Two Worlds (with Bill Herbert)
High-Opp (previously unpublished)
Angel’s Fall (previously unpublished)
A Game of Authors (previously unpublished)