3 volumes edited by Dieter Daniels and Hermann Braun, these 3 volumes are facsimiled notebooks from 1958/59 (during which time Brecht studied with John Cage), with the covers looking like the original notebooks and containing reproduced handwritten notes on ruled paper as well as footnotes in all three volumes and a conversation between Brecht, the editors, and Kasper König in the first volume.
3 spiral bound vols., 30 x 23 cm, 104 + 166 + 162 not numbered pages, Köln 1991
ISBN: 3-88375-144-8 / 3-88375-149-9 / 3-88375-150-2