PHILADELPHIA—Aspiring novelist Sandy Bellman took the last step in her personal journey as a professional writer last week when she was hired at a west-side Barnes & Noble. "This has been a big year for me creatively, and getting this was the biggest step yet," said Bellman whose hiring, according to sources close to the 27-year-old, will almost certainly be her greatest literary achievement. "After all this time, I'm finally part of the world of books." Bellman is expected to sell her first novel, most likely Khaled Hosseini's The Kite Runner or James Patterson's Judge And Jury, shortly after beginning her training shift next Monday.