Thomas DeLio is a composer and theorist, internationally renowned in both fields. His compositions have been performed worldwide and are recorded on numerous labels including Wergo (Germany), 3D Classics (France), Neuma, Centaur, Capstone, ERMMedia and Spectrum. He has published over thirty essays in such journals as The Journal of Music Theory, Perspectives of New Music, Interface, Artforum, Contemporary Music Review (London), Revue d'Esthetique (Paris), and MusikText (Cologne), and numerous books including Circumscribing the Open Universe (University Press of America; Italian translation, Semar Editore, Rome), The Music of Morton Feldman (Greenwood Press), and The Amores of John Cage (Pendragon Press). A book about his work, entitled Essays on the Music And Theoretical Writings of Thomas DeLio was published by The Edwin Mellen Press (2008), and a companion volume entitled Thomas DeLio: Collected Essays Vol. I (1980-2000) will be published by the Mellen Press in 2013. In 2011 the Special Collections in Performing Arts of the University of Maryland Library established an archive, The Thomas DeLio Papers. A companion volume entitled Thomas DeLio: Collected Essays Vol. I (1980-2000) will be published by the Mellen Press in 2016.