Retrospective of artists' books by John Baldessari Photo © Kunstmuseen Krefeld / Volker Döhne Retrospective of artists' books by John Baldessari Photo © Kunstmuseen Krefeld / Volker Döhne Retrospective of artists' books by Sol LeWitt Photo © Kunstmuseen Krefeld / Volker Döhne Retrospective of artists' books around the 1970s Photo © Kunstmuseen Krefeld / Volker Döhne Shop of artists' books Photo © Kunstmuseen Krefeld / Volker Döhne