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The gripping, unputdownable new thriller from the Sunday Times bestselling author of The Loving Husband

Your best friend will always be there for you...won't she?

Have you ever had that sense that you're being watched? And you turn, suddenly, but it's just a curtain, blowing in the wind? Or the dress hanging in the doorway?

Nat knows something's wrong. Her best friend, Beth, would never have upped and left without saying goodbye to her. But no one believes that Beth was taken - she is a fly-by-night, a party girl who can't be trusted. No one's listening to Nat.
But someone is definitely watching her...