Tall and lanky, with a retreating hairline over a wide forehead, brown eyes and a sharply angular nose, Haslett, 31, is still a bit stunned at the reception his debut book of stories, "You Are Not a Stranger Here" (Nan A. Talese/Doubleday), has received since its publication this summer. Not only has the book drawn critical raves, it was also recently chosen by author Jonathan Franzen ("The Corrections") as the second selection in the NBC "Today" show's fledgling on-air book club. So far, there are 100,000 copies in print, a fairly amazing number for a first book of stories by a virtual unknown.