15 x 25.5cm, 4pp plus 1pp insert. Gallery brochure on card and invite card announcing this solo exhibition by Von Graevenitz. Two works reproduced in black and white. Short biography and exhibition history and list of works exhibited. Towards the invisible I was the first of two group shows at the gallery intended to promote contemporary abstract art in Britain.

Works by Lygia Clark, Sergio De Camargo, Alejandro Otero and Jesus-Rafael Soto were included and there is a single b/w image of Lygia Clark's installations. Signals was an influential gallery often concentrating on kinetic - optical art and the Zero group. Short text by Richard Widdening in the gallery and future events.

20 x 21cm, unpaginated (300pp approx). Original covers. The extremely rare exhibition catalogue which is mostly notable for the Klein contribution where his page was partly burnt by him (at a time when he was making fire paintings) but there are other aspects of the book which also make this an important publication for other artists such as Spoerri (who glued a match to the back page of the book - perhaps in response to Klein - and indicated the whole catalogue should be burnt using it), and Tinguely has a sunflower seed attached to the book and Pienne has an intervention in the form of a perforation on a blank page preceding his pageworks (to allow their removal being of course the most important contribution to the book in his view).

Other artists present in this book include Lucio Fontana and Mack as well as other artists associated with Zero including Arman, Enrico Castellani, Piero Manzoni, Daniel Spoerri, Diter Rot, Raphael Jesus Soto, Piero Dorazio, Gunter Uecker, Bury, Adrian, Pomodoro, Lo Savio, Mavignier, Manfred Kage and Arnulf Rainer.

In very good + condition apart from one slight bump on the bottom corner for the entire book with BOTH original seed and matchstick in place which is very rarely the case when this already very scarce book is offered on the market. Extremely rare in this complete condition.