". . . an extended programme note for the non-specialist music lover" Read Full Review . . . Richard Maunder Early Music Review, London February 2005
". . . 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" Read Full Review . . . Neal Zaslaw Professor Cornell University Lecturer, The Julliard School World Renowned Musicologist
"I just finished 'Opus Ultimum.' Once again - BRAVO!!! I just couldn't put it down after I started it. It is a fascinating 'longest program note' on the Requiem - informative, entertaining, and highly suggestive in a somewhat X-rated fashion regarding Constanze and Süssmayr; and very intruiging as to the multi-possibilities explaining the assorted facts of the mystery. I LOVED it! What's next???" . . . Armen Boyajian Voice Teacher and Coach, New York City Former Music Director and Conductor of the Paterson Lyric Opera Theater
"It is high time the renowned Mozart authority, Daniel Leeson, put his learned comments down for the rest of us to enjoy. His description and factual presentation of how and why we got Mozart’s Requiem available to us is both disappointing and thrilling. Disappointing to learn that not all the Requiem was written by Mozart and thrilling to learn that most of the architecture was indeed written by the master. Daniel’s research was impressively detailed and exhaustive and his presentation was understandable to those of us who are not familiar with music composition. A really great read for those who are Mozart lovers." . . . Greyland Tuggle Mozart Aficionado