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. Kovacs is hired to solve the murder of a wealthy man named Laurens Bancroft, but as he delves deeper into the case, he uncovers a web of corruption and conspiracy that spans across different sleeves and centuries. Altered Carbon explores themes of identity, mortality, and the implications of technology on society, all within a gritty and action-packed narrative.