The fourth book in the Sunday Times bestselling, award-winning, Slough House series, featuring Mick Herron's much loved band of disgraced spies and their notorious leader, Jackson Lamb, 'the most fascinating and irresistible thriller series hero to emerge since Jack Reacher' (Sunday Times)

*Soon to be a major TV series starring Gary Oldman*

'A terrific spy novel' Ian Rankin

Twenty years retired from the Intelligence Service, David Cartwright still knows where the skeletons are hidden. But when he forgets that secrets are supposed to stay buried, there's suddenly a target on his back.

His grandson, River, is a 'slow horse', a demoted spy pushing paper at Slough House with other no-hopers. With his grandfather under threat, River ditches desk duty and goes rogue to investigate.

Jackson Lamb, the boss at Slough House, worked with David Cartwright back in the day. He knows better than most that this is no innocent old man. So when River's panic button raises the alarm at Intelligence Service HQ, Lamb will do whatever he thinks necessary to protect an agent in peril.

'A modern masterpiece' Irish Times

'Outstanding' Daily Telegraph