You think it will never happen to you: the ring of the bell, the police on the doorstep. First they check you're who they expected to find at the address. What they say next traps you in a nightmare, and there seems to be no way out. It starts with the words, 'I'm afraid...' Sally Lambert is afraid too - so scared, she can hardly stand up straight, and desperate enough to consider the unthinkable. Is it really, definitely, impossible to escape from this horror? Maybe not. There's always something you can do, right? Of course, no one would ever do this particular something - except the Lamberts, who might have to. No one has ever gone this far. Until Sally decides that the Lamberts will. 'No one writes twisted, suspenseful novels quite like Sophie Hannah'. Liane Moriarty