"La poesía de los números" is a book published by barcelona based publishing house Blackie Books, and written by Daniel Tammet, English essayist, writer and a Guiness World Record holder for memorizing the most digits of pi.

For the cover illustration I created the author's portrait entirely from the numeric keys on a vintage typewritter, combining numbers of different color densities to create the illusion of shades of grey.

Many thanks to Jan Marti and Olga Capdevila at Blackie Books whose guidance and art direction really helped this project take shape, and to Ana Franco Netto for filming, editing and photographing the whole process.