Vocabulary In Context Richness

Ursula K. Le Guin's The Left Hand of Darkness is far more complex than her other works; in terms of technical skill, it is arguably her most satisfying work to date. A delicate balance of ideas and passions is maintained throughout the intricate storytelling process. An overarching editorial framework is intermingled with interpolated tales, documents, diaries, and constant shifts in narrative time. This richness of texture does not impede the forward movement of the story or the suspense of the main plot. The popularity of the novel is likely due in part to its striking central idea: a world whose people are androgynous.

In the context of the passage, the word "richness" most nearly means