Constable Cathryn Books

The Wolf Princess

By Constable Cathryn

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The white tower

By Constable Cathryn

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When Livy's accepted at Temple College, a school for the very brightest, no one is more surprised than her, though she has always felt different. Recently, Livy's been drawn to the roof, where, amo...

The Pearl in the Ice

By Constable Cathryn

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The Wolf Princess

By Constable Cathryn

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Sophie et la princesse des loups

By Constable Cathryn

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La princesa de los lobos

By Constable Cathryn, Angeles Leiva

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La perla sota el gel

By Constable Cathryn, Jordi Vidal Tubau

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La princesa dels llops

By Jordi Vidal I Tubau, Constable Cathryn

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La princesa de los lobos

By Constable Cathryn

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Wolf Princess

By Constable Cathryn

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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.