4/5: This is the first in a series of books based on Detective Inspector John Marco. The story starts with the discovery of a body in the river Taff in Cardiff but, unusually, this isn't a suicide or an accident, it is murder as the man has had his tongue removed. John Marco is called in to investigate and he and his sidekick Detective Sergeant Boyd Pierce begin a very involved case. The victim is from the Polish community in Cardiff and the plot moves from purely murder into people trafficking and organised crime, with a bit of Russian Mafia-style killings thrown in, all helped by some rather o...