Robert Hellenga Books

Les Seize voluptes

By Robert Hellenga, Guillemette Belleteste

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Avokado Bahcesi

By Robert Hellenga

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La caida de un gorrion

By Robert Hellenga

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An American family disintegrates after a daughter is killed in an Italian terrorist bomb in 1980s Bologna. The mother enters a convent, the father has an affair with the daughter of his mistress, t...

De zestien lusten

By Hellenga Robert

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The Fall of a Sparrow

By Robert Hellenga

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The Italian Lover

By Robert Hellenga

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Italian Lover

By Robert Hellenga

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Italian Lover

By Robert Hellenga

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The Italian Lover

By Robert Hellenga

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The Italian Lover

By Robert Hellenga

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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.