Altered Carbon

Takeshi Kovacs wakes up after 250 years in hibernation. He is now in a different body, a fact made possible by modern technology. Humans are able to upload their profile into a device embedded in their bodies, a "stack". This allows humans to be immortal, as long as their stack is not damaged: if their body, or "sleeve", dies they can transfer themselves into a new sleeve and continue existing. The recently-murdered Laurens Bancroft, one of the wealthiest people in the world, now hires Kovacs to find out who murdered him.