Sonia Purnell Books

Clementine

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“Engrossing…the first formal biography of a woman who has heretofore been relegated to the sidelines.”–The New York TimesFrom the author of the New York Times bestseller A Woman of No Importance, a...

A Woman of No Importance

By Sonia Purnell

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Clementine

By Sonia Purnell

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A portrait of Winston Churchill's extraordinary wife and her lesser-known role in World War II discusses her relationship with political mentor Eleanor Roosevelt, her role in safeguarding Churchill...

Clementine

By Susan Lyons, Sonia Purnell

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Clementine

By Sonia Purnell

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First Lady

By Sonia Purnell

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First Lady

By Sonia Purnell, John Chancer

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Kingmaker

By Sonia Purnell

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A Woman of No Importance

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Woman of No Importance

By Sonia Purnell

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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.