Bertrand de Billy, while conducting and recording a sizable amount of instrumental music over the years, is generally associated with opera. In the new millennium he has devoted much time to the works of Wagner, appearing on a half-dozen or so DVDs of Wagner's operas, including a complete Ring. Massenet, Gounod, and other French composers have figured significantly in his operatic repertory, as well. In the instrumental realm, his tastes are varied and take in Mozart sacred works, Beethoven and Mahler symphonies, Debussy, Ravel, and Gershwin, and contemporary composers such as...