Rather Be The Devil, Ian Rankin

Rather Be the Devil: The superb Rebus No.1 bestseller (Inspector Rebus 21) 

A case that won't die...

John Rebus can't close the door on the death of glamourous socialite Maria Turquand.  Brutally murdered in her hotel room forty years ago, her killer has never been found. 

Meanwhile, Edinburgh's dark heart is up for grabs - but has criminal mastermind and Rebus's long-time adversary, Big Ger Cafferty, really settled down to a quiet retirement?  Or is he hiding in the shadows until Edinburgh is once more ripe for the picking?

Old enemies.  New crimes.  Rebus may be off the force, but he certainly isn't off the case.