Msgr. Theodor Maas-Ewerd, professor of liturgiology in the theology faculty of the Catholic University of Eichstatt in Bavaria, has revised Die Messe, the monumental work on the Eucharist by the late Dr. Johannes H. Emminghaus, professor of liturgiology and sacramental theology at the University of Vienna. Published as a revised edtion in German in 1992, this is the second edition in English (the first edition had eight printings).