The acclaimed author of Under the Harrow and A Double Life returns with her most thrilling novel to date - now a Reese's Book Club Pick.

THE INSTANT NEW YORK TIMES BESTSELLER

A REESE'S BOOK CLUB PICK - SOON TO BE A MAJOR NETFLIX PRODUCTION

'You'll devour Northern Spy . . . I loved this thrill ride of a book'
Reese Witherspoon

'A sharp, moving thriller: you lose your breath for adrenalin'
Abigail Dean, author of Girl A

'A chilling, gorgeously written tale'
New York Times

'Nerve-shredding suspense'
Daily Mail

'Thrillingly good... Flynn Berry shows a le Carré-like flair for making you wonder what's really going on at any given moment'
Washington Post

A producer at the Belfast bureau of the BBC, Tessa is at work one day when the news of another IRA raid comes on the air: as the anchor requests the public's help in locating those responsible for this latest attack - a robbery at a gas station - Tessa's sister Marian appears on the screen, pulling a black mask over her face.

The police believe Marian has joined the IRA, but Tessa knows this is impossible. But when the truth of what has happened to her sister reveals itself, Tessa will be forced to choose: between her ideals and her family.

Praise for Flynn Berry

'Breathtaking . . . Berry writes thrillingly'
New York Times

'Beautifully paced and satisfyingly ominous'
Guardian

'Mesmerizingly effective'
The Times

'A thrilling page-turner'
Paula Hawkins, author of The Girl on the Train

'Berry's clever, thrilling writing wound me in and left me heartbroken'
Fiona Barton, author of The Widow

'What a book! A skillful and compelling exploration of families, crime, and class'
Clare Mackintosh, author of I Let You Go