Friedrich Hild Books

"Portulane (Hafenbücher) und Portulankarten sind mit der in ihnen übermittelten grossen Menge an praktischen Informationen die ältesten erhaltenen Hilfsmittel der Seefahrt. Sie liefern Erkenntnisse...

Meilensteine Strassen und das Verkehrsnetz der Provinz Karia Milestones Roads and the Transportation System of the Province of Caria

By Friedrich Hild

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Milestones are crucial for the scholarly research of roads and the transportation system of a province. Written and archaeological sources as well as the geographic conditions add to the overall pi...

Das byzantinische Strassensystem in Kappadokien

By Friedrich Hild

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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.