This volume presents an interdisciplinary and systematic review of Catholic Education Studies across Ireland and Britain. Taken together, the chapters drill down to the foundations, identity and leadership matters in Catholic education and schools. It is in reading the complete volume that a more precise picture of Catholic education in Ireland and Britain develops into sharper focus. This is important because it reflects and crystallises the complexity which has almost organically developed within the field of Catholic Education Studies. It also provides a powerful antidote to the nave reductionism that would boil Catholic education down to just one or two fundamental issues or principles. Contemporary Catholic education, perhaps globally but certainly in Ireland and Britain, is best depicted in terms of being a colourful kaleidoscope of differing perspectives. However this diversity is ultimately grounded in the underlying unity of purpose, because each of the contributors to this volume is a committed advocate of Catholic education. The volume brings together a rich range of scholars into one place, so that these voices can be listened to as a whole. It includes contributions from leading scholars, blended with a plethora of other voices who are emerging to become the next generation of leading researchers in Catholic education. It also introduces a number of newer voices to the academic context. They present fresh perspectives and thinking about matters relating to Catholic education and each of them confidently stand alongside the other contributors. Moreover, these reflections on Catholic education are important fruits to have emerged from the collaboration made possible through the creation of the Network for Researchers in Catholic Education, which was established in 2016 under the auspices of Heythrop College, University of London.