15 books • 2 series
Book #20: Rirkrit Tiravanija/Hans Ulrich Obrist
Book #24: Cerith Wyn Evans. Hans Ulrich Obrist. The Conversation Series Vol. 24
Book #25: Dan Graham. Hans Ulrich Obrist.The Conversation Series 25
Book #26: Kazuyo Sejima (SANAA) / Hans Ulrich Obrist.
Book #27: Matthew Barney. Hans Ulrich Obrist