London rules / Mick 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 under attack: from the showboating MP who orchestrated the Brexit vote; from the showboat's wife, a tabloid columnist; from the PM's favourite Muslim, who's about to be elected mayor of the West Midlands; and especially from his own deputy, Lady Di Taverner. Over at Slough House, the crew are struggling with personal problems. But collectively, they're about to rediscover their greatest strength - that of making a bad situation much, much worse. It's a good job Jackson Lamb knows the rules. Because those things aren't going to break themselves.