(LEWITT, SOL, et al.) SIEGELAUB, SETH, pubs. Untitled [Xerox Book]. New York: Seth Siegelaub and John W. Wendler, 1968.4to, original white printed wrappers. Stated first (and only) edition of this seminal artists book, wherein Sol Lewitt's wall drawings (Drawings Series I, II, III, IV) were first published, along with contributions by Carl Andre, Robert, Barry, Douglas Huebler, Joseph Kosuth, Robert Morris and Lawrence Weiner, all of who were allotted 25pp. to comment on the Xerox format; the present work was actually printed using standard offset lithography. Limited to 1000 copies. Wrapper worn at the spine ends and edges; some light soiling to wraps.