Altered Carbon by Richard K Morgan (2002) Victor Gollancz Ltd

A science fiction/murder mystery/thriller that takes place in the far future.  Mankind has gone out to other worlds, which have their own wars, the U.N. is in charge on Earth.  And people can be re-sleeved into other bodies, with their ‘stack’ containing all their memories installed into the new body.  Drugs and cyber entities have taken advances as well.  So, when a ‘meth’ (short for Methuselah – a person who has lived hundreds of years) hires a highly trained envoy out of storage (prison) to prove he did not commit suicide, interviewing the envoy in his backed-up copy, things get complicated.  To top it off, the detective who grabs him and personally delivers him to the meth was in love with the mad whose sleeve (body) the envoy is wearing.  Sex, drugs and too many chiefs in this mixed metaphor of a tale.