Review of the hardback: 'As its title implies, this book deals with a rather broad issue on several levels and as such might appear at first blush to be somewhat overreaching. However, as a result of his superb research, impeccable organization and disciplined writing style, Marios Costambeys, a Lecturer in History at the University of Liverpool, has been able to synthesize enormous amounts of data into a coherent and insightful study that remains faithfully within the parameters of its main thesis.' The Medieval Review
'… careful work of scholarship. Costambeys writes in a clear and engaging style while his arguments are based on sound methodological groundwork.' Journal of Ecclesiastical History