Theft of Fire by Devon Erikson.

The story revolves around a space pilot named Marcus Warnoc, who is hired by a wealthy and cunning woman named Miranda Foxgrove to help her recover a mysterious artifact from a location in the outer solar system.

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Warnoc and Foxgrove have a contentious relationship, filled with arguments and mutual distrust, while a sentient artificial intelligence named Leela, based on the consciousness of a young girl, accompanies them on their mission.

The story explores the themes of ambition, greed, and the ethical implications of artificial intelligence, as well as the complexities of interpersonal relationships set against the backdrop of a vast and dangerous space environment.