The book by Constantin Floros is an expanded new issue of his 1979 “Mozart-Studien I.” The collection of papers and essays from 1963 to 1978 published at that time has been augmented by several more recent studies. Whereas the earlier texts concern Mozart’s overtures, operas, and symphonies, together with especially the stylistic levels of his opera music and church music in general, the more recent articles deal with topics such as merriment and melancholy, tragedy and comedy or cantabile qualities, including stage aesthetics or questions of reception as well. The collected works document the Greco-German author’s lifelong engagement with Mozart’s music.