'I raced through it.' Lucy Foley

'Outstanding.' Harlan Coben

'Heart-pounding.' Lucy Clarke

When you have it all

Sarah Collier has been lucky: she's got a glittering scientific career and a husband who loves her more than anything.

And you start to lose it

But now she's showing signs of early Alzheimer's, and the only hope for a cure is in a controversial new technology being unveiled in Switzerland.

You'd go anywhere for help

In Geneva, as events turn dangerous and her memory loss worsens, Sarah has to decide who to trust: the people around her - or, despite her symptoms, herself.