Engagement with Christian manuscripts – Eastern and Western – and with ancient and rare printed books makes evident a growing interest in material and codicological aspects of our book heritage. In other words, it evinces an emerging curiosity about the non-textual realities of books – at least of ancient books. This shift is particularly true for manuscript studies. The question of materiality remains unavoidable, however, even today, when we decide to edit a book in hard copy along with electronic or digital versions. As has always been the case, there is a direct correlation between the quality of materials used, the production/confection techniques and the external appearance of a book. Normally, one would not expect to find the finest inks, paper or parchment in the hands of less-skilled scribes or illuminators. This article sets alongside immediate material aspects corresponding, and usually expensive, issues like sewing and binding techniques, layout (mise-en-page) and decoration. They too condition our assessment – even unconsciously – when we meet religious books.