Love and Treasure is the first historical novel I've read by you, and I loved to attention to details. How much research did you do while writing the book?
Vast amounts. Research is the fun part. You can tell yourself you're working, without having to put words on the page. I traveled to Budapest, Salzburg and Dachau. I had research assistants in Budapest and Salzburg pulling documents and searching through archives. I read tons of nonfiction books and articles, and I read novels written during the period. Eventually I had to force myself to stop researching and just write.