With an embattled Secret Service fighting everything from terrorism to privatisation by the back door, the Monochrome inquiry into historic wrongdoing is a mere irritant. But as civil servant Malcolm finds a mysterious envelope in his shopping trolley, Monochrome is about to light everything up.

Mick Herron’s new standalone thriller is read by Nina Sosanya.

Abridged by Eileen Horne
Producer: Eilidh McCreadie

Mick Herron is the bestselling author of the Slough House thrillers and Zoe Boehm series, and winner of the CWA Gold Dagger. His books featuring Jackson Lamb have been adapted for TV as the ‘Slow Horses’ series starring Gary Oldman and Kristin Scott Thomas. Show less