I didn’t want to write this book. Even the thought of it scared me, but it hammered away at my conscience. When I finally gave in, I took elaborate precautions. After signing a book deal, I made my editor promise not to contact me again until I got in touch with him. I warned my husband never to talk about the book at home. Then, to do the actual writing, I bought a computer that had never had online access and kept it locked in a safe in my bedroom.

Whole piece is here:
http://www.theguardian.com/books/book...