Rebus.
All of it/them.
Having never read any!
Ian Rankin is a near contemporary at Edinburgh University where I almost went to study English lit (he'd have moved into Phd territory as I arrived)... so there's an affinity with the changing world in which we/Rebus lives, and with the musical references.
I'm just over half way through the 20+ books - Rebus is still on vinyl records, computers have arrived. His Saab is running quite well.
Will