Brian Paepper, 39, a Dutch-born Angeleno, owns Alias Books, formerly West L. A. Book Center, on Sawtelle Boulevard. He sees a future in the used-book business, as long as it is treated as a business. The previous owner, Paepper said, would place high prices on books he felt especially attached to, and they wouldn't sell. He refused to utilize the Internet. To keep the store in business and relevant, Paepper has taken to selling textbooks and brought the store's inventory online.