London Rules by Nick Herron

London Rules might not be written down, but everyone knows rule one. Cover your arse. Regent's Park's First Desk, Claude Whelan, is learning this the hard way. Tasked with protecting a beleaguered prime minister, he's facing attack from all directions himself: from the MP who has his sights set on Number Ten; from a tabloid columnist, who's crucifying Whelan in print; from the PM's favourite candidate about to be elected the West Midlands mayor, despite his dark secret... Meanwhile, the country's being rocked by random terror attacks. It's a good job Jackson Lamb knows the rules. Because they're not going to break themselves.