Shredder

In the gut-wrenching third and final novel in Niall Leonard’s Crusher series, Finn Maguire is lured back into the warring factions of the underworld by way of blackmail.
 
Finn “Crusher” Maguire has one simple task: to set up a meeting. But when that meeting is between the Guvnor and the Turk, two psychotic criminals vying for control of London’s underworld, Finn’s task proves to be anything but simple.  As the city cracks under a blistering heatwave and the UK is rocked by a series of terrorist outrages, Crusher finds himself caught up in a gang war full of carnage, corruption and treachery. To save himself and the girl he loves from being shredded to a bloody pulp between opposing factions, Finn faces horrifying risks and impossible choices.

From the Hardcover edition.