Coming to Find You by Jane Corry

A heart-stopping psychological thriller about a woman running from the aftermath of a gruesome family tragedy-and also from the truth about her part in it. For fans of Gillian McAllister's Wrong Place Wrong Time and The Family Remains by Lisa Jewell.
You can run away from your life . . . but you can't hide from murder.
Nancy's mother and stepfather have been brutally killed. After a trial that gripped the nation, her stepbrother has been convicted of the double murder. But the end of the trial is just the beginning of a new nightmare for Nancy: the press is rabid, certain that she is hiding something. Certain that she knows more that she's telling about that night at the farmhouse . . .
Determined to disappear, Nancy flees to the seaside in Devon, to Tall Chimneys, her grandmother's secluded inn-a place that holds many dark wartime secrets.
Then someone sends her a letter. They know the truth about the night Nancy's mother and stepfather were murdered. They know she's been lying. And they promise to come find her. Because they have nothing to lose.