Three women from different walks of life converge at Bletchley Park during WWII. Together they break codes that save thousands. But a traitor among them threatens everything — and years later, they must reunite to solve one final puzzle. Quinn's best and most ambitious novel.
Mild — wartime romance subplot.
Skip if you dislike:
Moods: Empowering Suspenseful Wartime Sisterhood
Tropes: Female Codebreakers Bletchley Park Friendship Betrayal
Yes, complete standalone.
Yes — the real WWII codebreaking center. Women's roles are historically accurate.
Many readers consider it Quinn's masterpiece.