Gerrit Valk Books

Picasso in Holland

By Marilyn McCully, Michael Raeburn, Lidewij De Koekkoek, Benno Tempel, Gerrit Valk, Sandra Jongenelen

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In 1905 verbleef de jonge Pablo Picasso korte tijd in Schoorl, Hoorn en Alkmaar. Hoewel hij hier maar enkele weken doorbracht, is deze periode wel van betekenis geweest voor zijn kunstenaarschap. J...

Pantsers stooten door stuka s vallen aan

By Gerrit Valk

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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.