Book excerpt: The ever-increasing number of performances of Bach's music is a sign of its enduring vitality. But perhaps no other composer is subject to such a wide diversity of interpretation--assessing the merits of these many interpretations and unravelling the sources and documents on which they are based can be extremely difficult for the modern performer. In this important book, Paul Badura-Skoda draws on forty years of studying and performing Bach to present startling new insights into many different aspects of Bach's music. He looks at rhythm, tempo, articulation, and dynamics; examines the instruments for which Bach's music was intended, and considers problems of sonority. He then discusses ornamentation in depth, analyzing each of the signs and symbols used by Bach, and argues that much of Bach's ornamentation in current performance is monotonous and fails to reflect the actual Baroque style. Sometimes contentious, always stimulating, Badura-Skoda's book conveys a passion for an informed interpretation of Bach's music based on a recognition and respect for Bach's actual intentions. Copiously illustrated with musical examples, the book will take its place as a standard work for all students and performers of Bach's ever-popular keyboard music.