Gwyn Campbell Books

An Economic History of Imperial Madagascar, 1750-1895: The Rise and Fall of an Island Empire

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"The first comprehensive economic history of precolonial Madagascar, this study examines the island's role from 1750 to 1895 in the context of a burgeoning international economy and the rise of mod...

Child slaves in the modern world

By Gwyn Campbell

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Child slaves in the modern world

By Gwyn Campbell

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Child slaves in the modern world

By Gwyn Campbell

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David Griffiths and the missionary History of Madagascar

By Gwyn Campbell

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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.