Canadian book, author & setting!!

Tortured, then murdered, a university student dressed up as Santa Claus is left hanging from a meat hook on Christmas Eve - a gift intended for one particular cop. Detective Emile Cinq-Mars, local hero and old-style cop, wants the truth - and his gripping search takes him through a bone-chilling Montreal winter and into the heart of the city's colorful criminal underworld, where rival biker gangs, the Russian Mafia and meddlers from the CIA all vie for a piece of the frozen city.

Given to Darcy...