People know accuracy when they read it; they can feel it.

If you read the history of the national Socialist party, they're all people who felt like life should have been better to them. They're disappointed, vengeful, angry.

The best Paris I know now is in my head.

I write about the period 1933-42, and I read books written during those years: books by foreign correspondents of the time, histories of the time written contemporaneously or just afterwards, autobiographies and biographies of people who were there, present-day histories of the period, and novels written during those times.

For something that's supposed to be secret, there is a lot of intelligence history. Every time I read one book, two more are published.

Poland is a wildly dramatic and tragic story. It's just unbelievable what went on with those people. How they survive, I don't really know. The Germans had a particular hatred for the Poles; they really considered them subhuman Slavs, and they were very brutal to them.