Peter Grant returns in this Rivers of London novel where a holiday in Scotland proves to be the beginning of another case.

'This isn’t London. The rules are different up here.'

Detective Sergeant Peter Grant takes a holiday up in Scotland. His partner Beverley, their young twins, his mum, dad, his dad's band and their dodgy manager all tag along. Even his boss, DCI Thomas Nightingale, takes in the coastal airs as he trains Peter's cousin Abigail in the arcane arts.

Scotland's Granite City has history and mystery, myth ... and murder. When a body is found in a bus stop, fresh from the sea, the case smells fishy from the off. Something may be stirring beyond the bay - but there's something far stranger in the sky.