Tessa Dunlop Books

The Bletchley girls

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The woman of Bletchley Park have a unique story to tell. Although critical to the success of the project to break the German and Japanese codes in the Second World War, their contribution has been...

The Bletchley girls

By Tessa Dunlop

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The woman of Bletchley Park have a unique story to tell. Although critical to the success of the project to break the German and Japanese codes in the Second World War, their contribution has been...

"Aged eighteen, Tessa Dunlop went to post-revolutionary Romania to work in an orphanage -- to do something remarkable to help her get into Oxford. Once there she didn't want to leave and ended up s...

Elizabeth and Philip

By Tessa Dunlop

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Elizabeth and Philip

By Tessa Dunlop

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Elizabeth and Philip

By Tessa Dunlop

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The Bletchley girls

By Tessa Dunlop

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The woman of Bletchley Park have a unique story to tell. Although critical to the success of the project to break the German and Japanese codes in the Second World War, their contribution has been...

Century Girls

By Tessa Dunlop

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Century Girls

By Tessa Dunlop

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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.