Mark Harris Books

The Heart of Boswell: Six Journals in One Volume

By James Boswell

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The Heart of Boswell

By James Boswell

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The Doctor Who Technical Manual

By Mark Harris, Harris Mark

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A guide to the technological fantasies, including advanced tools, weapons, computers, spaceships, robots, and lifelike human clones, introduced on the long-running British science fiction televisio...

The Doctor Who technical manual

By Harris Mark

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Something about Soldier

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Public Accounts of Canada Part One

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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.