House of shadows - Pamela Hartshorne

When Kate Vavasour wakes in hospital, she can remember nothing about the family gathered around her bed, or of her life before the accident. The doctors diagnose post-traumatic amnesia and say the memories should start returning. Which they do . . . but these memories are not her own. They belong to Isabel Vavasour, who lived and died at Askerby Hall over four hundred years earlier . . .

Returning to Askerby Hall to recuperate, Kate finds herself in a house full of shadows and suspicions.
Unable to recognise her family, her friends or even her small son, she struggles to piece together the events that led to her terrible fall.
Life at Askerby, it seems, is not as illustrious as the Vavasours would have the public believe. But before she can uncover the mysteries of the present, she must first discover the truth about the past ... Was Isabel's madness real, or was her mistake trusting the one person she thought would never betray her?