"The words of the Hebrew sage have come true: 'Of making books there is no end.' What will happen if mechanics everywhere take up the pen? We're done for. Even cattle and stones will write. All the papyrus of the Nile will not suffice."
Petrarch, Invectives against a physician. Trans. David Marsh. The I Tatti Renaissance Library. (Cambridge/London: Harvard University Press, 2003): II.45.
Since we now live in an even more extreme age of bookish surfeit: when was the last time you read a book by cattle or stones?