Faced with the store's closing and the loss of her job, Scully didn't want to see this neighborhood mainstay with a political bent (an antiwar poster adorns the door and a nice section of books on nuclear war sits inside) disappear.  She believes she can keep the store afloat by attracting younger customers.  "I wanted the store to stay here," she said, adding that, as she spoke, three patrons in their early 20s were browsing in her shop.  Brian Paepper, 39, a Dutch-born Angeleno, owns Alias Books, formerly West L.A.  Book Center, on Sawtelle Boulevard. 