Ruth Rendell

My mother was a Swede who grew up in Denmark. When I go there, I visit the street where she grew up and look at her house, which is still there, and the snowberry bush, from which she ate some berries and had to have her stomach pumped.

I have an idea, and I have a perpetrator, and I write the book along those lines, and when I get to the last chapter, I change the perpetrator so that if I can deceive myself, I can deceive the reader.

My favourite book - 'The Good Soldier' by Ford Madox Ford, which I have read about 20 times - is different from my favourite author, who is Iris Murdoch. I find her books exciting and unputdownable. Her characters are so carefully studied and in-depth; I love that.