Blind Eye Logan McRae, Book 5 by Stuart MacBride

Aberdeen's growing Polish community is under attack from a serial offender who leaves mutilated victims to be discovered on building sites - eyes gouged out and the sockets burned.Detective Sergeant Logan McRae is assigned to the investigation, codenamed Operation Oedipus, but with the victims too scared to talk, it's going nowhere fast. When the next victim turns out to be not a newly arrived Eastern European, but Simon McLeod, owner of the Turf n' Track bookies, Logan suddenly finds himself caught up in a world of drug wars, prostitution rings and gun-running courtesy of Aberdeen's oldest and most vicious crime lord.