The Lettered edition is a Dorfner style binding after master German bookbinder Otto Dorfner, who developed this structure in the early 20th century. The binding is sewn on supports with goat leather strips laminated to silk, with the boards attached to the textblock by the sewing supports. The boards are covered in full goatskin with foil blocking on the spine. The tapes on the covers are hidden under leather decors cut from the same goatskin as the cover, and the flyleaves are covered with a suede material on one side. The Gemini symbol is hand-cut from brass by Piotr Czołczyński, and is patinated and attached to the front cover. The clamshell enclosure is quarter leather with European cloth sides. The edition is handbound by Jacek Tylkowski in Komorniki, Poland. The text pages are set in Copernicus and Erler Titling, and are printed offset on Mohawk Via Vellum paper.
