''Compulsively readable'' SUNDAY TIMES''A superior medical thriller'' GUARDIAN''Darkly gripping'' OBSERVERYou''re trained to save the lives of others. But how far would you go to save your own?Olivia, Laura and Anjali couldn''t be more different. Inseparable since the first day of medical school, their bond has remained unbreakable. Years ago, they promised nothing would come between them - including the wild university party that forced them to make a deadly choice.Now working as doctors in high-pressure jobs, with lives and families of their own, their secret binds them tighter still. But when an eerily similar tragedy affects their teenage children, the choice the three women face may not be one their friendship can survive . . .