Altered Carbon is a science fiction novel written by Richard K. Morgan. Set in a future where consciousness can be transferred to different bodies, known as sleeves, the story follows Takeshi Kovacs, a former soldier turned private investigator. As Kovacs investigates a murder, he becomes entangled in a web of political intrigue and corporate power. Altered Carbon delves into themes of identity, immortality, and the ethical implications of transhumanist technologies.