Mindfulness-Based Relational Supervision explores a relational and mindfulness-based approach to adult learning and development that is mutually transformational.The initial focus of the book is a case study that shows the evolution of a dialogical supervision relationship that was transformational for both parties. The authors present their reflections and analysis of key transformational moments that brought insights which significantly enhanced their personal and professional development. The authors adopt an interdisciplinary approach, discussing relational neurobiology and relational mindfulness practice together with ideas from child and adult development, attachment theory, intersubjectivity, somatic experiencing, and adult learning theories. The case study narrative charts the development of the authors’ supervision relationship, following which they share a meta-perspective on their learning journey. Finally, they discuss the implications of the study for the education and training of relational practitioners in supervision, coaching, and related fields.The book will appeal to students, practitioners and supervisors in the helping professions, in particular counselling, psychotherapy, and coaching.