Ursula Ertz: A Look Away Book

In August 2019 e-enterprise got A Look Away Book by Ursula Ertz. This is a unique copy. The language is German. A weird book, readable unreadable – that's the subtitle. Its an artistic examination on mathematics, music and everyday life. The book contains beautiful one line illustrations. From mathematical point of view one can say that these curves are orientable, self-cutting 2D ones, which are not differentiable at some points and refer onto the chaos theory. Many Thanks!