Guy A. Marco, now retired, was Dean of Kent State University's School of Library Science and Senior Fellow at Rosary College, Dominican University. He is the general editor of Garland's Composer Resource Manuals and Music Research and Information Guides series.
"I find this an absolutely essential research tool. The best proof I can give is that I have room for exactly three books on opera in the tiny book shelf on my PC work-station, and that this is one of them." -- Tom Kaufman, The Opera Quarterly
"This effort surpasses the first edition in content, quality, and design." -- Choice
"An essential reference tool for all academic libraries as well as public libraries." -- Choice _
"[e]xtremely useful annotated bibliography...[Marco] deserves thanks for the enormous amount of research expended on [this] project." -- Opera Quarterly