The last work of a modern master, however fragmentary, is a matter of public interest and scholarly importance. The nuances of “Laura” and her fate have been hotly debated on bookish Web sites and elsewhere, with Tom Stoppard, for example, calling for the matches and John Banville urging clemency in The Times of London. Now, Dmitri Nabokov has announced that “Laura” will indeed be published, and suggests in a Q. and A. conducted by e-mail with the Week in Review that, in fact, her peril has been exaggerated.