Susan Lentigo's daughter was murdered twenty years ago - now, at long last, she will witness the killer's execution.

But on her journey she discovers shocking new evidence that suggests the condemned man is innocent - and the real killer is still out there. Even worse, her new suspect has a young daughter who's at terrible risk.

The FBI refuses to reopen the case. They - and Susan's own mother - believe she's having an emotional breakdown. With no money or time to waste, but with the help of two unlikely allies - a cynical teenage girl and the retired cop who made the original arrest - Susan sets out to win justice for the condemned man and her daughter.

'One small-town woman's quest for the most poignant kind of justice you could imagine.' - Lee Child

'[A] unique and powerful thriller following one mother's cross-country journey to find the truth.' - Lisa Gardner, New York Times best-selling author

'Fast-paced, riveting' - Alice Hunter, best-selling author of The Serial Killer's Wife

'Surprising, propulsive, and poignant. I inhaled this novel' - Meg Gardiner

'I devoured The Necklace in a single evening' - Hollie Overton