Berlin: edition Ruine de Kunste, n.d. (1989)
21 x 30cm, unpaginated (c. 240pp) plus original card covers. Privately published by Kahlen this is a major monograph and record of his own artistic activities and that of other artists who showed at his gallery in Berlin. Artists include Bernard Laib, Peter Hutchison, Robert Filliou, Gerhard Ruhm amongst others. Colour and b/w images throughout. texts in german. VG.