Thanks to my colleague – Conrad Taylor – for pointing me at this. A fascinating video showing how books were made before the introduction of digital typesetting and electronic publishing. As Conrad observes in the comments: "Some …assume that the digital age has replaced the printing press. Not so! Most books and magazines are printed by offset lithography. So things are digital up to the point where the litho plate is imaged — but intricate, complicated and huge machinery takes over from that point onwards!"
However, my recent foray into e-books (having just purchased a Kindle) does remove even the heavy machinery dependency. With more and more content available in electronic form, I'm wondering whether the printing press will be obsolete within 50 years?