Picture two people, young and in love. Picture them being separated from one another. Picture them keeping their love alive through letters. So far, so simple. Now imagine they’ve not just been separated geographically, but also historically. Imagine that their love and letters now defy time and place, life and death. By now you realize that this novel is unique. And, when you learn how it has made Russian literary-prize history, and has to-date been sold in twenty-two languages, you begin to sense just how unique…