Lettera Mono — Initially drawn for the book Area 2, and is used throughout the book exclusively. The font is based on a single weight basic specimen of a mid 70‘s typewriter font designed by Joseph Müller-Brockmann for Olivetti. Lettera is available as an Extended Latin OpenType format, including eastern European, Turkish, Baltic scripts, and alternate glyph. The specimen used for redrawing the first weight was a lo-resolution scan. When blown up large, it showed what appeared to be “reversed” ink-traps in critical joints of some glyphs. These elements that guided the design and later turned out to be a mistake caused by the poor quality of the document, remained. Lettera was later developed into a proportional version, Lettera-Txt, also available at Lineto.