The Demon Princes is a galactic saga that Jack Vance wrote in five installments: The Star King (1960), The Killing Machine (1964), The Palace of Love (1965), The Face (1978), and The Book of Dreams (1979). It draws upon elaborate worldbuilding, which the author introduces in the form of “sources,” e.g., imaginary magazines, scientific papers, and textbooks describing exotic planets, alien peoples, strange rules, and customs. Quoted at the beginning of a chapter, these fictional sources minimize the need for long descriptive paragraphs.

Here are a few examples taken from the first novel, The Star King:

Chapter 1:

From an interview with Mr. Smade of Smade’s planet, a feature article in Cosmopolis, October 1523:

A short Q&A introduces the reader to the concept of Beyond, short for  “Beyond the Pale” or border, which separates the group of solar systems explored and settled by humans from the largely unknown Galaxy.

Most of the action revolves around the adventures of Kirth Gersen, an enigmatic character seeking revenge for the kidnapping and enslavement of his people. To this end, Gersen must confront five cruel overlords, the Demon Princes. The confrontations usually happen in the Beyond, a place, according to Mr. Smade, “frequented by the most notorious pirates and freebooters.”

Chapter 2:

From an article in Cosmopolis, May 1404:

Here Vance introduces Brinktown: “Once the jumping-off place, the last outpost, the portal into infinity – now just another settlement of the North East Middle Beyond.” As is often the case in SF novels, Brinktown seems to be both the name of the planet and the city, the latter being portrayed colorfully: “an explosion of architectural conceits, what turrets and spires, belfries and cupolas… the magistrates are assassins; the civil guards are arsonists, extortioners, and rapists.” We cannot help thinking of Star Wars Mos Eisley: “Not a more wretched collection of villainy and disreputable types exists anywhere on Tatooine.”

Chapter 4:

From New Discoveries in Space, by Ralph Quarry:

“The Rigel Concourse… twenty-six magnificent planets, most of them not only habitable but salubrious, though only two display even quasi-intelligent autochthones.”

When Kirth Gersen isn’t hunting for one of the Demon Princes beyond the Pale, he usually hangs around the Rigel Concourse, the planetary system of the blue supergiant star Rigel. According to Jack Vance, Rigel has twenty-six planets, of which Alphanor – the setting of most of the first novel – is the eighth. Jack Vance based the worldbuilding of The Star King on the early sixties astronomy. However, SF authors should be careful not to be too specific when including real planets or stars in their stories. What was then state-of-the-art knowledge soon became obsolete. It has been known for decades that extremely short lifetimes prevent blue supergiant stars like Rigel from developing habitable planets (before they turn into neutron stars or black holes).

Another good example can be found in the second novel, The Killing Machine:

Chapter 3:

From Chapter 1, The Astrophysical Background, in Peoples of the Concourse, by Streck and Chernitz:

The quotation at the beginning of the chapter partially answers the objections we raised above:

“But the very circumstances which make the Concourse what it is, provide one of the galaxy’s most tantalizing mysteries. Rigel is deemed by most authorities a young star, ranging in age from a few million to a billion years. How then to explain the Concourse, [with its] twenty-six mature biological complexes? [Some] have wondered if the planets of the Concourse were not conveyed hither and established in these optimum orbits by a now-dead race of vast scientific achievement.”

In other words, plot holes in SF stories stretching over several novels can be retroactively fixed with accurate worldbuilding in the next installments. To quote a famous example, this is what happened with some inconsistencies in the Star Wars Original Trilogy (1977-83), e.g., Leia kissing Luke, who turns out to be her brother, and Leia remembering her biological mother, who died in childbirth. All apparent errors were later explained in the “prequels” (1999-2005) and recent spin-offs like Kenobi (2022).