Volker Leppin Books

Wilhelm von Ockham. Gelehrter, Streiter, Bettelmonch.

By Volker Leppin

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Martin Luther

By Volker Leppin

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Martin Luther: A Late Medieval Life

By Volker Leppin, Volker Leppin, Bezzant, Rhys, Karen Roe, Timothy Wengert

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This brief, insightful biography of Martin Luther strips away the myths surrounding the Reformer to offer a more nuanced account of his life and ministry. Coinciding with the 500th anniversary of t...

Texte zu Theologie und Ethik.

By Sigrid Muller, William Of Ockham, Volker Leppin

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Johann Gottfried Herderkessler

By Martin Kessler, Volker Leppin

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Der Antichrist

By Mariano Delgado, Volker Leppin

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Gott in der Geschichte

By Mariano Delgado, Volker Leppin

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Media Salutis

By Berndt Hamm, Gury Schneider Ludorff, Volker Leppin

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Martin Luthers Tischreden

By Stefan Michel, Katharina Barenfanger, Volker Leppin

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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.