Book excerpt: Collaborative Insights provides new perspectives informed by interdisciplinary thinking on musical care throughout the life course. In this book, volume editors Katie Rose M. Sanfilippo and Neta Spiro define musical care as the role that music - music listening as well as music-making - plays in supporting any aspect of people's developmental or health needs, for example physical and mental health, cognitive and behavioural development, and interpersonal relationships. Musical care is relevant to several types of music, approach, and setting, and through the introduction of that new term musical care, the authors prioritise the element of care that is shared among these otherwise diverse contexts and musical activities, celebrating the nuanced interweaving of theory and practice. The multifaceted nature of musical care requires reconciling perspectives and expertise from different fields and disciplines. This book shows interdisciplinary collaboration in action by bringing together music practitioners and researchers to write each chapter collaboratively to discuss musical care from an interdisciplinary perspective and offer directions for future work. The life course structure, from infancy to end of life, highlights the connections and themes present in approach, context, and practices throughout our lives. Thus, the book represents both the start of a conversation and a call to action, inspiring new collaborations that provide new insights to musical care in its many facets.