This comprehensive, in-depth work book on Bach's Well-Tempered Clavier should be part of every pianist's, piano teacher's, and advanced piano amateur's library.
The book is part II of a four-volume work that consists of various elements. A general Introduction covers topics like the origins of the WTC, the "well-tempered" scale, the clavier at Bach's time, the history of the prelude and the background of fugue composition. This is followed by a catalogue of very specific Questions Regarding a Prelude and Questions Regarding a Fugue, which the reader is urged to answer for him- or herself with regard to a particular prelude and fugue. The scope of the questions, their possible implications and the terms used are explained step by step in a section entitled Additional Information. The main body of the book, under the heading "Model Answers," contains in-depth investigations into the structure, material, performance practice and interpretation of each of the 48 preludes and fugues. These individual chapters, dedicated to one prelude+fugue each, are illustrated with music excerpts, diagrams, and graphic representations.
