The gripping new psychological suspense novel from the bestselling author of breakout hit HE SAID/SHE SAID

This novel was previously published as Stone Mothers in hardback.

Gripping, terrifying and moving back through time to reveal twists you'll never see coming, We Know You Know delivers shocks and suspense from a master of thriller writing.

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'Addictively scary and thrillingly audacious' Nicci French

'Captivating, cleverly constructed' Paula Hawkins

'One of the best writers in the genre. Properly chilling' Red

'I heard the swish of falling paper. I grazed my knuckles retrieving a beige folder, its grubby white ribbon loose. Looping doctor's handwriting. Addresses. Dates. Names. Photographs! I had found the patients whose notes would bring the past back to life.'

A lifetime ago, a patient escaped Nazareth mental asylum. They covered their tracks carefully. Or so they thought.
Thirty years ago, Marianne Smy committed a crime then fled from her home to leave the past behind. Or so she thought.

Now, Marianne has been forced to return. Nazareth asylum has been converted to luxury flats, but its terrible hold on her is still strong. A successful academic, a loving mother and a loyal wife, she fears her secret being revealed and her world shattering.

She is right to be scared.

'Kelly is a master' Observer

'So CLEVER ... and the writing is perfection' Marian Keyes 'Another twisty, layered, nuanced story' Ruth Ware