Book excerpt: The Davie McCall saga returns in Devil's Knock. Davie McCall has darkness inside him. A darkness that haunts him, but also helps him do despicable things to those trying to cause him and his friends harm. When Dickie Himes is killed in a club owned by the Jarvis clan, it sparks a chain of events that Davie knows can only lead to widespread gang war on the streets of mid- 90s Glasgow. The police are falling over themselves to solve the crime, but when justice is so easily bought or corrupted, Davie needs to take matters into his own hands. Davie has to contend with the ghosts of those he has failed, a persistent Hollywood actor and a scruffy dog with no name. When he finds a target on his back, will Davie be able to suppress the darkness inside him and refuse to kill... Or will the devil s knock be too tempting?