Opera has been around ever since the late 16th century, and it is still going strong in the sense that operas are performed around the world at present, and known by infinitely more persons than just those who attend performances. On the other hand, it has enjoyed periods in the past when more operas were produced to greater acclaim. Those periods inevitably have pride of place in this Historical Dictionary of Opera, as do exceptional singers, and others who combine to fashion the opera, whether or not they appear on stage. But this volume looks even further afield, considering the cities which were and still are opera centers, literary works which were turned into librettos, and types of pieces and genres. While some of the former can be found on the web or in other sources, most of the latter cannot and it is impossible to have the whole picture without them.

A user's guide to opera—Matthew Aucoin, "the most promising operatic talent in a generation" (The New York Times Magazine), describes the creation of his groundbreaking new work, Eurydice, and shares his reflections on the past, present, and future of opera

From its beginning, opera has been an impossible art. Its first practitioners, in seventeenth-century Florence, set themselves the unreachable goal of reproducing the wonders of ancient Greek drama, which no one can be sure was sung in the first place. Opera's greatest artists have striven to fuse multiple art forms—music, drama, poetry, dance—into a unified synesthetic experience. The composer Matthew Aucoin, a rising star of the opera world, posits that it is this impossibility that gives opera its exceptional power and serves as its lifeblood. The virtuosity required of its performers, the bizarre and often spectacular nature of its stage productions, the creation of a whole world whose basic fabric is music—opera assumes its true form when it pursues impossible goals.