The Guilty Party'MASTERFUL' Guardian 'IMPOSSIBLE TO PREDICT' Erin Kelly 'UTTERLY COMPELLING'Crime Monthly '5*' Heat 'WELL CRAFTED AND CHILLING' Woman 'MCGRATH IS A DIAMOND HARD TALENT' Financial Times On a night out, four friends witness a stranger in trouble. They decide to do nothing to help. Later, a body washes up on the banks of the Thames and the group realises that ignoring the woman has left blood on their hands. But why did each of them refuse to step in?