SUNDAY TIMES BESTSELLER `I loved it ... Persons Unknown is like walking on quicksand, for reader and detective alike' VAL MCDERMID Second literary thriller from bestselling author of MISSING, PRESUMED. A brutal murder. A detective with no one left to trust. A YOUNG MAN MURDERED A city banker bleeds to death yards from a Cambridgeshire police headquarters. A DETECTIVE OUT OF HER DEPTH DI Manon Bradshaw's world is turned upside down when the victim turns out to be closer to her than she could have guessed. WHO SHOULD SHE BELIEVE? When even her trusted colleagues turn their backs on her, it's time to contemplate the unthinkable: are those she holds dear capable of murder?