The pages reproduce frottaged images of objects in the streets of Cologne, gas caps, sewer covers etc. Tom Phillips did a similar project in London but only used images of water caps which had a skull-like appearance. -- Source of annotation: Marvin or Ruth Sackner.

The book is printed from cheap paper retrieved from East Germany when it was a Communist state. Many of the images are taken from shipping boxes and labels. -- Source of annotation: Marvin or Ruth Sackner.