Spy for a Greedy Villain (The Adventures of Grant Scotland, Book Four) - The Adventures of Grant Scotland, #4

Racial tensions in Aelfa simmer and threaten to boil over when the harbormaster is found dead and the Huthan oppressors threaten to crack down in the Lower Docks. As Grant Scotland finds more questions than answers in the journals of Berthul Magnussen about his father's treachery, he is drawn into a murder investigation, a kidnapping plot and the nefarious machinations of the city's biggest crime lord-Mr.
Quinn. In order to stop Quinn's plans and save the city from being thrown into open revolt, Grant prepares to take his biggest gamble yet.