The Liaden Universe is a science fiction setting created by authors Sharon Lee and Steve Miller. It features a complex interstellar society where trade, family, and honor play crucial roles. The stories often revolve around the lives of the Liaden people, who value their cultural traditions and social structures. The universe includes various planets, each with unique cultures and technologies. Key themes include the importance of relationships, the balance of power, and the consequences of choices. Notable works in this universe include the Agent of Change series and the Crystal Variation series, which explore these themes through engaging characters and plots.