An important and timely book: school leaders - with operational and strategic roles - would do well to immerse themselves in this insightful publication. The reality and consequences of disrupted teacher supply and declining rates of teacher retention provide the critical backdrop for the varied, yet well-balanced, chapters. The authors are clear that these issues warrant acknowledgement and understanding, but also recognise that short-term managerial responses can unwittingly magnify the astonishing professional exodus. It matters to respond in an intelligent and informed way.