Opera Bouffe or Light Opera might better be used in this title than ""Musical Comedies"" (or did I see an incomplete galley proof?) For in the main, this follows established patterns of virtually a digest of opera librettos, a precis of outline and argument of the main grand operas -- and light operas- of the outstanding German, Australian, Italian, French composers. Each opera brief is prefaced by a paragraph on the composer and his place in opera history. Verdi and Wagner have more of their works included than any others. There are a few moderns,- Korngold, Krenck, and one or two others. Is there a place for another such book? Or is its very compactness -- covering around 35 composers- its chief recommendation?