The red house / Emily Winslow.

Maxwell is living a nightmare when he begins to question whether his fiance Imogen is his own sister separated by adoption. Worse, he fears that she may already know that she is, and is marrying him anyway. A visit to her birthplace in Cambridge stirs up some deja vu that confirm Maxwell's troubles. Former DCI Morris Keene languishes at home, struggling with a debilitating injury. DI Chloe Frohmann's new partner is all too willing to believe the worst when Morris' daughter Dora is accused of assisting a suicide. Buried skeletons discovered next to an old barn link the suicide and Imogen's childhood, revealing horrors in the past and triggering danger in the present.