Altered carbon

500 years in the future, people are functionally just software, uploaded and downloaded into new "sleeves" (bodies) at will. Dead? New sleeve (if you can afford it; it's like buying a house). Business trip? Have yourself broadcast into a clone or synthetic body on the other side of the country, or world, or galaxy.

Altered Carbon is about a mercenary hired by a 300 year old rich guy to investigate his own murder, which the police insist was a suicide. It's an interesting blend of science fiction and detective noir. It has a grungy techno feel, sort of like the Blade Runner movie. There's intrigue, kidnappings, official corruption, gunfights, even a couple of femme fatales.

Morgan takes full advantage of his hypothetical technologies to play around with questions of identity. How much of a person is defined by the body he wears? If you copy yourself into another sleeve, at what point are you no longer really the same person? Right away? Never, since your two copies shared 100% of their formative experiences? It's fascinating, and the philosophical questions somehow don't slow down the well-written action sequences. Possibly the best book I've read in the last couple years.