Simon Serrailler faces his most dangerous challenge yet in the edge-of-your-seat thriller from Susan Hill, the bestselling author of The Woman in Black. Going undercover, he must leave town immediately, change his identity and sever all contact with friends and family. And, more importantly, he must inhabit the mind of the worst kind of criminal. But can he do so without losing everything? 'Crime writing with a dark, fierce edge' Daily Mail 'Keeps the reader gripped until the last page' Sunday Express Discover the bestselling crime series that over ONE MILLION readers have devoured.