Gisa Jahnichen’s book Studies on Musical Diversity – Methodological Approaches consists of twelve studies on musical diversity in the broadest sense in which a variety of methods depending on the particular research topic, the main research questions and the dimension of expected response are applied. It is segmented into six chapters, each with a pair of studies that can be compared in methodology, research aim and prospective function. Their vision under different headlines emphasizes the main focus given although each study comprises a set of different methods and includes varying formats of presentation. All twelve studies are revised and extended parts of researches undertaken in a time frame of about fifteen years. They were conduct...