Harrison Mark Books

Medicine and victory

By MARK HARRISON, Harrison Mark

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One day we will live without fear

By Harrison Mark

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"Based on historical records, One Day We Will Live Without Fear tells what life was like for people in the Soviet police state. The author outlines the seven basic principles on which that police s...

Economics of capitalism.

By Harrison Mark

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All about music theory

By Harrison Mark

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Medicine and Victory: British Military Medicine in the Second World War

By Mark Harrison

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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.