This is the 15th book in the series with three new and challenging cases for the detectives to solve. In The Case of the Crooked Politician, Shark's father-in-law comes to him with a concern that one of his colleagues - the minister for Immigration is extorting money from desperate migrants. The investigation turns out to be a family affair as Shark enlists the aid of his mother, who is still waiting to find out about her own citizenship applications,...