The typeface is FF Hertz, named after Heinrich Hertz, a German physicist, who proved the existence of electromagnetic waves. FF Hertz is a uni-width typeface, meaning that each letter occupies the same width in all weights. If you change the weight of a word or a whole line, the text will not reflow. We particularly like the figures: they remind us of our 70’s typewriters. For titles, chapter headings and other places requiring a louder voice, we picked a typeface by a good friend, Christoph Koeberlin, who describes his Fabrikat thus: “It is a geometric typeface which is based on 20th century German engineers’ typefaces. Due to its constructed architecture it works well in headlines and other display use.”