Henry Porter Books

LumiA re de fin

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À l'enterrement de David Eyam, les cloches sonnent à toute volée et non doucement, comme c'est la coutume pour les morts. Kate Lockhart, une ancienne du SIS en Indonésie, s'y rend avec de grands pa...

Une vie d espion

By Regina Langer, Henry Porter

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Brandebourg

By Porter Henry

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Les secrets des maitres vendeurs

By Porter Henry

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Maitre des Chaises Renversees

By Porter Henry

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Der englische Spion.

By Henry Porter

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A spy's life

By Porter Henry

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A spy s life

By Porter Henry

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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.