White Rage — Campbell Armstrong

Glasgow is burning after a series of racially motivated murders, and it's up to Detective-Sergeant Lou Perlman to put out the fire in international bestselling author Campbell Armstrong's riveting thriller

First an Asian business owner falls to his death from his sixth-story apartment. Next an Indian woman, a kindergarten teacher, is shot dead. Meanwhile, Detective Perlman grieves quietly for his brother, killed in a hail of gunfire, and wrestles with his attraction to his sister-in-law, Miriam. There is no rational motive for the killings -- none except pure racially driven hatred.
 
With the emergence of a group called White Rage, fear ripples through the city and Perlman has to get answers fast. As he looks beneath the bright surface of the city where he was born, he finds longtime enemies, dangerous businessmen, and ancient connections that will disturb and threaten the wrong people when their secrets are finally revealed.

White Rage is the 3rd book in the Glasgow Novels, but you may enjoy reading the series in any order.