Altered Carbon, written by Richard K. Morgan, is a science fiction novel set in a future where consciousness can be transferred between bodies, known as sleeves. The story follows Takeshi Kovacs, a former soldier turned private investigator, as he is hired to solve a murder. In this world of advanced technology and transhumanist possibilities, the rich can live indefinitely by transferring their consciousness to new bodies, while the poor struggle to survive. Altered Carbon explores themes of identity, mortality, and the ethical implications of transhumanist technologies.