Elizabeth Kostova Interview, May 1, 2012 Interviewer: Rob Neufeld   Q:  What mode are you in now with your new novel?   A:  I’m in a composing and finishing mode because I’m writing this book under contract, and I’ll turn in a rough draft in December.  I’ve done a lot of research, and I keep doing research, as I go along and narrow my questions.  With this one, I’ve done a lot of plotting ahead o…