`` i 'm interested , '' he said , breaking into a grin . no , its intended purpose has long since run out , the porter said . the young woman tried to use another spell but her strength was not enough . his sister 's hands balled into fists . `` what would the world be without napkins ? its last week all over again , i remind her , glancing to her briefly . why do we like to teach others new things ? she instantly wanted to take the words back . 