books.google.com - In the Course of Performance is the first book in decades to illustrate and explain the practices and processes of musical improvisation. Improvisation, by its very nature, seems to resist interpretation or elucidation. This difficulty may account for the very few attempts scholars have made to provide...https://books.google.com/books/about/In_the_Course_of_Performance.html?id=74IIU85CKmAC&utm_source=gb-gplus-shareIn the Course of Performance