This book celebrates two important aspects of the London 2012 Olympic and Paralympic Games. (1) For those involved in any aspect of Olympism, and particularly coaches and athletes, London 2012 was about realising dreams, achieving success and participating in competitive sport at the highest level. This book sets out some of these dreams and the part coaches play in this. (2) The book also looks at the notion of ‘coaching-for-performance’ and does this from an international and multi-sport perspective. From interviews with Olympic coaches, the experiences of those working in the field of high performance and from applied sport researchers, the book uses the metaphor of the ‘coach-as-alchemist’ in order to capture the dynamics of coach-athlete relationships and performance. Sports such as diving, swimming, gymnastics, skiing are included as well as individual and team sports.The book is set within the context of elite sport, high performance and coaching. Its contents illuminate two important kinds of reflective practice: (a) Reflection-ON-action (b) Reflection-FOR-action. The style of presentation includes narratives, reflective conversations, ethnographic work, interview analysis and video-clips available on-line.This book was published as a special issue of Reflective Practice.