Even dogs in the wild

Detective Inspector Siobhan Clarke is investigating the death of a senior lawyer during a robbery. But the case becomes more complex when a note is discovered, indicating that this may have been no random attack, and when local gangster Big Ger Cafferty receives an identical message, Clarke decides that the recently retired John Rebus may be able to help. He's the only man Cafferty will open up to, and together the two old adversaries might just stand a chance of saving Cafferty's skin.