In this book which is also designated as Tangenten No.4, a small square of mirror is set in stamped out thin card pages. One glassine page overlays it with a printed magic square poem. Parts of the backing of the mirror have been scatched out by the artist and it has been glued down to the card. Poetry has been printed on the pages with the stamped out sections. This book was edited by Walter Aue. -- Source of annotation: Marvin or Ruth Sackner.

The French title is "En-haut et en-bas" or "Top and Bottom,"or "High and Low." Each page is a print of Kolar's typogrammes from the 1960's. The pages are cut so that a portion of typing from the following pages become an important part of the composition. Kolar created new configurations with the typewriter that were known as "creations plastiques." The Sackner Archive holds unique typewritten pages that were bound into a unique binding by Pella Erskine Tullock. -- Source of annotation: Marvin or Ruth Sackner.

The bookbinding was done by Jane Rollo. Each copy is virtually unique since collages were made adhering a limited number of the defective printed pages onto the pagea of the printed book. -- Source of annotation: Marvin or Ruth Sackner.