Disguise, debt, death, deceit, dispute - and that's only the beginning of the bizarre story of the commissioning, creation and conflict over the Mozart Requiem, much of which was not written by Mozart! A lay-person who wishes to explore this strange tale could hardly do better than to acquire a copy of Daniel N. Leeson's Opus Ultimum, which is written in the style of a detective novel unburdened by musicological bells and whistles. . . . Neal Zaslaw Professor, Cornell University World Renowned Musicologist