This is the first Eamon Duffy I have read, but I will certainly be reading more, especially as I am particularly interested in his specialist period and area. This is a fascinating book, in that it studies not the books themselves (which are beautifully illustrated) but the additions made to them. Many of these detract severely from the beauty of the book as a work of art, but Duffy's intention is to reveal the uses to which books of hours were put, and the reasons for the additions (sometime deletions). Duffy's work here is thorough, cogent and informative, despite the fact that he gives space in his text to demolish the theories and assertions of other academics along the way. The reference and bibliographical matter is also very useful, and has led me on to much further research. All in all an excellent book, with the quality of the numerous photographs vying with the brilliance of the text.