Cada capítulo de la versión digital del libro está dedicada a una librería distinta: Bakka-Phoenix, Amazon.com, Borderlands Books, Barnes & Noble, Secret Headquarters, Powell's City of Books, Books of Wonder, Borders, Compass Books/Books Inc., Anderson's Bookshops, la librería universitaria de la Universidad de Washington, Forbidden Planet, Books-A-Million, Mysterious Galaxy, Chapters/Indigo Books, Booksmith, Waterstone's, Sophia Books, MIT Press Bookshop, The Tattered Cover, Pages Books, y Hudson Booksellers.