1972 — Estetica e teoria dell'informazione (Milano: Bompiani) Edited by U. Eco.
1979 — A Semiotic Landscape (The Hague: Mouton) Edited by S. Chatman, U. Eco and J.M. Klinkenberg. Proceedings of the First Congress of IASS-AIS, Milano, 1974.
1983 — The Sign of Three: Peirce, Holmes, Dupin (Bloomington: Indiana University Press) Edited by U. Eco and T.A. Sebeok; итальянский перевод: Il segno dei tre (Milano: Bompiani 1983).
1988 — Meaning and Mental Representations (Bloomington: Indiana U.P.) Edited by U. Eco, M. Santambrogio and Р. Violi.
1989 — On the Medieval Theory of Signs (Amsterdam: Benjamins) Edited by U. Eco and Costantino Marmo.
1992 — Gli gnomi di Gnu (Milano: Bompiani) With Weugenio Carmi.