The definitive international edition of the world-famous classic "Laws of Form" - fully translated into German. Thomas Wolf and Spencer-Brown collaborated closely on the translation. This edition now also includes, as bonus material, the first proof of the famous four-color theorem, which mathematicians believed would never be proven. This section is in English and spans approximately 70 pages. Regarding the content in German: The British graph and number theorist J.C.P. Miller at the University of Cambridge, who was the first mathematician to follow Professor Spencer-Brown's proof of the famous four-color theorem for maps, remarked: "His proof of the four-color theorem is the most exciting piece of mathematical detective work I have ever seen. There is no doubt that he did it.".