Yale University Press, 2002, ISBN: 0-300-09304-7; Paperback $12.95.
Originally published in 1959 as Sviluppo dell’estetico medievale and revised in 1987 as Arte e bellezza nell’estetica medievale, this work was translated into English in 1985. In 2002, Yale University Press placed it back in print. Here is the description from the publisher:
In the first English translation of this authoritative, lively book, the celebrated Italian novelist and philosopher Umberto Eco presents a learned summary of medieval aesthetic ideas. First published twenty years ago and now translated into English for the first time, the book juxtaposes theology and science, poetry and mysticism, in order to explore the relationship that existed between the aesthetic theories and the artistic experience and practice of medieval culture.
You may read more about this work at the Yale University Press Web site.