What are you doing with all those books anyway?" Ron asked. Just trying to decide which ones to take with us," said Hermione. When we're looking for the Horcruxes."Oh, of course," said Ron, clapping a hand to his forehead. "I forgot we'll be hunting down Voldemort in a mobile library.
J.K. Rowling, Harry Potter and the Deathly Hallows
books, packing