The gripping new psychological thriller from the bestselling author of After Anna and Killing Kate.

Imitation is the most terrifying form of flattery...

Which Sarah Havenant is you?

When an old friend gets in touch, Sarah Havenant discovers that there are two Facebook profiles in her name. One is hers. The other, she has never seen.

But everything in it is accurate. Photos of her friends, her husband, her kids. Photos from the day before. Photos of her new kitchen. Photos taken inside her house.

And this is just the beginning. Because whoever has set up the second profile has been waiting for Sarah to find it. And now that she has, her life will no longer be her own...