Black and Blue

I'm not sure how I feel about Black and Blue. Ian Rankin's 8th mystery featuring John Rebus was a very good novel, but the mystery didn't quite work. Exiled to a particularly downtrodden Edinburgh police station, Rebus gets assigned to the murder of an oil worker. Somehow, this connects to environmental protesters, drug dealing in Aberdeen, and an old case (one of Rebus's first) which has resurfaced, putting Rebus under investigation (again). I never managed to tie the threads together, but I enjoyed my time with John Rebus, depressed - and to be honest, depressing - as he is.