The book critically investigates professional education programmes and the assumptions upon which they are based. It argues for an ontological turn in which professional education attends not only to what students know and can do, but also who they are becoming as professionals. In a scholarly, well-grounded account, the book closely interweaves theory and empirical material on learning to be professionals. It provides a fresh, innovative approach to designing professional education programmes, as well as to research about this important enterprise. This book makes a timely, insightful contribution to debate about educating for the professions.