: The Duke of Caladan , The Lady of Caladan , The Heir of Caladan . Short Stories and Extras

When users search for "All Dune books," they often face a schism in the fanbase: the works of Frank Herbert versus the works of his son, Brian Herbert, and co-author Kevin J. Anderson. Regardless of critical reception, a complete collection must include these to truly merit the "All" designation.

The data-crystal hummed against Kael’s palm, a cold sliver of glass containing the weight of ten thousand years. In the flickering light of a glow-globe, he watched the directory manifest—a digital roadmap of a universe defined by spice and sand.

These have appeared in sci-fi magazines or limited-run anthologies. You may need to convert them or find bundled fan collections (search for "Dune Short Fiction Omnibus ePUB"):