The biggest library ever built

Ben Macintyre Says Ptolemy's great book collection at Alexandria had nothing on what is being compiled on the internet: "This digitising of human knowledge is the most profound cultural event since the invention of the printing press itself. In the third century BC the librarians of Alexandria sought to collect “books of all the peoples of the world”, and amassed perhaps half a million scrolls. But even the library at Alexandria was thought to contain perhaps as little as a third of all the books then written."