The term "installation" defining site-specific sculpture has in recent years established itself firmly as part of the vocabulary of contemporary visual arts. This issue of "Art & Design" demonstrates the variety of approaches undertaking by artists working in this medium. Installation is an art which grew out of the individual narratives presented by architecture, painting, sculpture, theatre and performance. Central to most installation art is a notion of space as a visible material with properties such as wood or stone. "Installation Art" contains a large presentation of hitherto unpublished work by Arakawa and Madeline Gins, together with essays by Jean-Francois Lyotard, Thierry de Duve, the Museum of Installation, London and Corinne Diserens on Gordon Matta-Clarke. There are also statements and works by Joseph Kosuth, Richard Artschwager, James Turell, Cady Noland, Judith Barry, Lothar Baumgarten, Dan Graham, Donald Judd, Andrew Sabin and Anya Gallaccio.