A Tale of Two Cities

A Tale of Two Cities was a book which was published in 1859. (AUDIO: The Pursuit of History)

In 2007, Toshiko Sato scanned the book with an alien data scanner salvaged by Torchwood Three. She then attached the scanner to her computer, and was able to read the book on the screen. (TV: Everything Changes)

Behind the scenes
In The Ultimate Foe, Melanie Bush mentions the character of Sydney Carton, implicitly from this book by Charles Dickens, after the Sixth Doctor quoted him.