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.

To ask questions can become the laziest and wobbliest occupation of a mind, but when you must yourself answer the problem that you have posed, you will meditate your question with care and frame it with precision.