When I sit down to write, which is the essential moment in...

When I sit down to write, which is the essential moment in my life, I am completely alone. Whenever I write a book, I accumulate a lot of documentation. That background material is the most intimate part of my private life. It's a little embarrassing - like being seen in your underwear It's like the way magicians never tell others how they make a dove come out of a hat.