Hannah Holman Books

Titanic Voices

By Hannah Holman

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Titanic voices

By Hannah Holman

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Tommies Manual 1916

By Hannah Holman

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The trench cookbook 1917

By Hannah Holman

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Why did trench tea taste of vegetables? What was the single largest componant of a Tommy's diet? What were 'iron rations'? Why was 'Maconochie' the most despised food at the front? The old adage th...

Trench Cook Book 1917

By The War Office, Hannah Holman

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Life As a Battle of Britain Spitfire Pilot

By Hannah Holman

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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.