Book similar to the housemaid?

Hi everyone! A friend told me about a book very similar to the housemaid by Freida McFadden and I need to find the title please! The story is apparently very similar with a nanny coming to work for a family. She stays in the attic but there is a weird door in the attic from where she hears strange noises. And the father of the family is actually her own father too and she came to confront him… Does anyone know the title of this book please? Thank you!!