Riffing off the Tube Map is not entirely a modern phenomenon, as this Penguin book cover from 1977 shows. (Re)design by John Carrod.
Source: coversetc/Flickr
Riffing off the Tube Map is not entirely a modern phenomenon, as this Penguin book cover from 1977 shows. (Re)design by John Carrod.
Source: coversetc/Flickr