Barrier offers a current and international overview of the walls, fences and partitions invented to separate populations and other groups from each other. It contains a collection of news articles that have been published on both sides of the wall. All information is literally divided. The builders are rendered readable, and the suppressed are placed mirrored on the other side of the paper. Because of the slightly transparent paper all texts and images are just visible enough to read or view and basically form an imaginary wall within the book.