The Secret Keeper by Susan Lewis

It’s only been a few months since Olivia got the all clear, and she’s just begun piecing her life back together. But in the year that she spent fighting cancer, a lot has changed, not least in her own marriage to Richmond.

Something has happened to the sleepy town of Kesterley on Sea, something big, and it’s making everyone uneasy. Suddenly, the place that Olivia has always called home is her treating her like a stranger and old friends won’t look her in the eye. So when ghosts from the past come back to Kesterley, it can’t be a coincidence.

But when everyone is keeping secrets, how can she know who to trust?