One of the hundred books a year I read:

On her twenty-fifth birthday, Libby Jones finally learned what her birth parents left her in a trust—the deed to a mansion in the Chelsea neighborhood of West London. As the youngest of three children, and the only one known to still be living, her inheritance makes her wealthy.

Visiting the abandoned house unnerves her. She sees the kitchen where her parents committed suicide with a stranger, a man’s whose identity has never been uncovered. She enters the nursery where police discovered her as an infant, healthy and cared for despite the carnage below.

Little is known about what happened. According to neighbors, numerous people lived in the house, adults and children, including Libby’s older brother and sister. They all disappeared without a trace.

Unsure what to do with the house and unnerved by her early history, Libby digs into the past to find out what really happened.