There was a time when software developers worked with consultants that will do things for their company or teach some technical knowledge. Agile approaches have brought forward another type of people: coaches. According to Rachel Davies and Liz Sedley, a coach doesn’t tell you what to do, rather she shows you how she thinks you might do things and hope that it will help you to improve your situation. She leads by example. It is not easy to write a book on this type of topic. The authors recognize this situation and manage to achieve a good balance between general advice and practical usage reports.