Measures of success are the criteria that we believe show the impact of our work. The measures may be quantifiable or qualitative, but they are observable in some way. Throughout this book, you will explore music from many different countries around the world and learn about many composers that you did not encounter in Book 1. You will also explore some of the fascinating historical events and literature that help bring the days of these composers to life. This book includes performance tracks with live musicians playing the music from your book, as well as accompaniment tracks so you can play along. You may also access all recordings online with authentication code in book.