This is an amazing story.
No, not Hunters of Dune, though it is a great read. Rather, the story of how this book came to be.
Frank Herbert is ranked with the greatest Science Fiction writers. He penned the award-winning Dune in the mid-1960s and, before his death in 1986 wrote five sequels (Dune Messiah, Children of Dune, God Emperor of Dune, Heretics of Dune, Chapterhouse: Dune). He also co-wrote Man of Two Worlds with his son, Brian Herbert, and The Road to Dune with Brian and Kevin J. Anderson. Before his death, Frank Herbert discussed with his son his plans for a seventh Dune novel. As Herbert and Anderson explain in the Author's Note to Hunters of Dune:
In 1997, more than a decade after the death of his father, Brian began to discuss with Kevin J. Anderson the possibility of completing the project, of writing the fabled Dune 7. But apparently Frank Herbert had left no notes, and we thought we would have to do the project based solely on our own imaginations. After further discussions, we realized that a great deal of preliminary work needed to be completed before we could tackle Dune 7 - not just laying groundwork for the story itself, but also reintroducing the book-buying audience and a whole new generation of readers to the incredible, highly imaginative Dune universe.
More than twenty years have passed since the publication of Chapterhouse: Dune. while many readers loved the original classic Dune or even the first three books in the series, a significant portion of the audience had not continued all the way through to that last book. We needed to reawaken interest and get those readers prepared.
We decided to write a trilogy of prequels first... When we began to dig through all of Frank Herbert's stored papers in preparation for writing House Atreides, Brian was surprised to learn of two safe-deposit boxes that his father had taken out before his death. Inside the boxes, Brian and an estate attorney discovered a dot-matrix printout and two old-style computer disks labeled "Dune 7 Outline" and "Dune 7 Notes" - pages describing exactly where the creator of Dune had intended to take his story.