Sanctuary by Valentina Cano Repetto

Grief leaves a stain.
Sibilla Fenoglio wants nothing more than to live with her husband in this run-down, derelict watermill. Uninhabited since the Renaissance after a mysterious disaster befell the previous owners, the mill requires extensive repairs. But there is something frightening about the mill. Repairs are violently undone, half-seen figures begin stalking Sibilla through the grounds, and haunting echoes of the previous owners' lives infiltrate the present. As the disturbances grow more vicious and her husband more secretive, she realizes that she and her child are in danger.
For readers who enjoy The Hacienda by Isabel Cañas, The Stroke of Winter by Wendy Webb, The House in the Orchard by Elizabeth Brooks, and The Winter Guest by W. C. Ryan.