This book is an interdisciplinary project that brings together ideas from aesthetics, philosophy, psychology, and music sociology as an expansion of German philosopher Hans-Georg Gadamer's theory on the aesthetics of play. This way of thinking focuses on an ontology of the process of musicking rather than an ontology of discovering fixed and static musical objects. In line with this idea, the author discusses the importance of participation and involvement in this process of musicking, whether as a listener or as a performer. Christensen then goes on to critique and update the theory by...