The Family Upstairs by Lisa Jewell

The story made headlines - three people dead from a mass suicide and a baby found upstairs in her crib. Libby was that baby and living a modest life until the call that turned her into the owner of a mansion in Chelsea. As she begins to piece together her history, we get to visit the other children that lived in that house and what their experience was there. A sinister story that is tense, well-paced and a plot that pulls you in so that you can't put the book down until you know the truth. For fans of Lisa Jewell, this is one of her best and one I would recommend for any thrill-seeking reader.