Stefan Roye Books

A Catalogue of Byzantine Manuscripts in Their Liturgical Context Challenges and Perspectives.

By Gerard Rouwhorst, Klaas Spronk, Stefan Roye

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"The world of Byzantine manuscripts is fascinating but also confusing. Although they play an important part in modern studies on the history of Christian liturgy and on the textual history of the B...

Byzantine Liturgical Books

By Andrew Wade, Stefan Roye, Stefanos Alexopoulos, Stig Simeon R. Froyshov

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.