In Chopin's set of 24 interconnected Preludes (Op. 28), we are presented with 24 distinct compositional surfaces, aiming at as many distinguishable emotional expressions. As such, the Preludes stand as a virtual survey of the developing musical manners of the 19th century--which was, after all, the stylistic period in which mood was promoted most energetically and frankly. Under analytic investigation, the technical means to these varied expressive ends can be discovered and assessed. 24 separate explorations reveal themselves to the inquiring musician, who can investigate any or as...