A diary revealing her neighbours' darkest secrets turns up on a woman's doorstep. Do you have any idea what the people you know are capable of? Dorothy Koomson asks how well you can really know your neighbours.

What if all your neighbours' secrets landed in a diary on your doorstep? What if the woman who gave it to you was murdered by one of the people in the diary? What if the police asked if you knew anything? Would you hand over the book of secrets? Or ... would you try to find out what everyone had done?