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, but as he delves deeper into the case, he uncovers a conspiracy that threatens to unravel the fabric of society. The book combines elements of cyberpunk, noir, and action to create a gripping and thought-provoking adventure.