North of Nowhere by Steve Hamilton
'That summer, it was all about secrets...I already had one bullet inside me. I knew I didn't have room for another.' Alex McKnight rarely ventures out from his home these days, even to spend time at his friend Jackie's Glasgow Inn - he's had enough of getting his ass kicked. Even as he lets Jackie force him out one night for a poker game at a stranger's house, Alex is certain it's a bad idea. When the genial atmosphere rapidly deteriorates, he starts to think maybe he was right. And then three masked, armed robbers burst through the door, and things get a whole lot worse. Soon Alex's three closest friends are implicated in the robbery, and Alex finds himself the object of hostile attention from the victim, not to mention a maniacal chihuahua. As events spin out of control, it becomes clear that somebody is not telling the truth, and has put them all in terrible danger...