[2] It describes in great detail many aspects of the Dune universe not covered in the novels themselves, such as character biographies and explanations of key elements, including planets, factions like the Bene Gesserit and Mentats, the spice melange, and technology such as heighliners and stillsuits.

"[4] Herbert himself wrote the foreword for the Encyclopedia (dated November 1983), which noted: Here is a rich background (and foreground) for the Dune Chronicles, including scholarly bypaths and amusing sidelights.

[6][7] Rather than claiming to contain absolute fact about this universe, the introduction by Benotto notes that "readers of The Dune Encyclopedia should understand its limitations: it is not designed as a definitive study of the entire eras encompassed by the Atreides Imperium" and that a portion of the (fictional) source material is shaped by the interests and influences of the God Emperor Leto II.

[9]Entries in the encyclopedia were written by multiple contributors: Joan Bouchelle, Edgar L. Chapman, Judith A. Clark, Michael Clayton, Grace W. Eckley, Greta Eisner, Peter Facione, J.L.

Gervais, Stephen Goldman, Lee Granell, Jane Hipolito, William Hornaday, Wesley D. Ives, Edward M. Jennings, Alan Kaye, Dorothy Kilker, Gillian Kitrick, Linda R. Levy, Gregory Lichtenberg, Victoria Lustbader, Michael W. McClintock, Willis McNelly, Douglas J. McReynolds, Walter E. Meyers, Frederic H. Miler, Myron Orleans, Charles A. Povlovich, John Quijada, Julia Reed, R. Reginald, Thomas E. Roberts, John A. Ryan, Roger Schlobin, Maureen A. Shifflett, Ray C. Shifflett, Joyce Tally, Stephen Tobias, Michael Tolley, Robert Trowbridge, John A. Turner, Christine Watson, and Carl B.

[10] Dave Langford reviewed The Dune Encyclopaedia for White Dwarf #61, and stated that "The production is quite impressive, though real or faked photos instead of line-drawings would have added greatly to the 'encyclopaedia' look.