Martha Hall Kelly Books

NEW YORK TIMES BESTSELLER • One million copies sold! Inspired by the life of a real World War II heroine, this remarkable debut novel reveals the power of unsung women to change hist...

Golden Doves

By Martha Hall Kelly

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The Golden Doves

By Martha Hall Kelly

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Two female spies risk everything to hunt down an infamous Nazi in this sweeping, profound tale of bravery from the bestselling author of Lilac Girls. “A riveting story of two brave and amazi...

Lilac Girls

By Martha Hall Kelly

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Lilac Girls of Ravensbruck

By Martha Hall Kelly

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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.