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“Demiurge” as a book category centers on makers of worlds and the worlds they make. Drawing on the ancient notion of a craftsman-god who shapes reality—benevolent, indifferent, or flawed—it gathers speculative fiction in which gods, sorcerers, scientists, or AIs architect, simulate, or rewrite universes, and those inside reckon with that authorship. Core themes include creation and imperfection, power and responsibility, free will versus design, rebellion against the creator, and the ethics of engineering sentient life. Hallmarks include nested or simulated realities, reimagined creation myths, metafictional “author-as-god” turns, and protagonists who either confront their maker or become demiurges themselves. The tone ranges from visionary wonder to metaphysical dread, offering big-idea thought experiments about what it means to build—and to be built.

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