Century Rain by Alastair Reynolds
Centry Rain is a mystery science fiction novel. Don’t read the back, it gives the mystery away. Two storylines develop: a twenty-second century archaeologist who has just made a career-ending (and possibly life-ending) mistake, and a private detective in Paris in the nineteen-fifties asked to take on the case of a suicide that the police won’t believe could have been a murder.
The storylines seemingly have nothing in common, then suddenly everything clicks into place. A fascinating and well-paced read.