Paula Hawkins

The journalism, I was a financial journalist - it's very good training as a writer. You have to write for deadlines; you have a certain economy of phrasing. As a training ground as a writer, it's fantastic. I also think it teaches you to be observant, to listen to people, and gives you an ear of dialogue from doing interviews.

I don't have a partner, so I take care of the mortgage by myself, and I was thinking, 'Oh God, I'm going to have to sell the house or find a new career.' I was not in a good place, but it was a real spur to get 'The Girl on the Train' right. I had to nail it and do it really well. It really concentrates the mind, that kind of thing.

When I have a creative insight, there is a high. I think back in the day, I made music as much as I did because it made me feel so good. I think you could argue that there is a creative addiction - but, you know, the healthy kind.