Mark Billingham

A reader's own imagination is a far more powerful form of CGI than anything any movie can provide because it's unique. In your own imagination, you can enter all sorts of worlds, and they are unique to you because no other reader will interpret a book the same way.

We didn't have all the distractions that young people have today. We didn't have these incredible computer games and social networks to engage with. I understand that. But once young readers do discover reading, when they discover a book which they fall in love with, it really unleashes something new in their imagination.

I believe that if writers want their readers to care about a character, they have to care themselves. I have to root for a detective who screws up as much as Thorne does, who shares my birthday, my North London stomping ground, and my love of country music, both alt and cheesy.

The day a character becomes predictable is the day a writer should think about moving on - because the reader certainly will.

I wanted to write at school - to write funny stories which the teacher might ask me to read out to the class. It's all basically about showing off.

My dad was a terrible father. Dreadful. But he had a very difficult childhood. He was fostered - he never knew who his father was. So he had a very different attitude to family and kids. I don't have any issues. I'm not suffering some secret angst.

London was a city of ghosts, some deader than others. Thorne knew that in this respect, it wasn't unlike any other major city - New York or Paris or Sydney - but he felt instinctively that London was .... at the extreme. The darker side of that history, as opposed to the parks, palaces and pearly kings' side that made busloads of Japanese and American tourists gawk and jabber. The hidden history of a city where the lonely, the dispossessed, the homeless, wandered the streets, brushing shoulders with the shadows of those that had come before them. A city in which the poor and the plague-ridden, those long-since hanged for stealing a loaf or murdered for a shilling, jostled for position with those seeking a meal, or a score, or a bed for the night.A city where the dead could stay lost a long time