Mary Jo Putney Books

Not Always a Saint

By Mary Jo Putney

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Once a Soldier

By Mary Jo Putney

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Once a Rebel

By Mary Jo Putney

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As Washington burns, Callista Brooke is trapped in the battle between her native England and her adopted homeland. She is on the verge of losing everything, including her life, when a handsome Engl...

Once a Scoundrel

By Mary Jo Putney

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“Putney’s endearing characters and warm-hearted stories never fail to inspire and delight.” —Sabrina Jeffries An outcast on the high seas . . .   The son of a proud nav...

Not Quite A Wife

By Mary Jo Putney

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Once a Spy

By Mary Jo Putney

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Love and survival in the shadow of Waterloo . . .   Wearied by his years as a British intelligence officer, Simon Duval resigns his commission after Napoleon’s abdication. Hoping to find...

Once Dishonored

By Mary Jo Putney

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Sparks fly in the page-turning new read from mistress of the Regency genre and historical romance legend, Mary Jo Putney. Will a disgraced former soldier and a beautiful brazen woman determined to...

Once a Laird

By Mary Jo Putney

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Bridgerton and Outlander fans as well as readers of Mary Balogh, Grace Burrowes, and Stephanie Laurens won’t want to miss this thrilling and clever new love story of a wandering laird, duty-b...

Seduction on a Snowy Night

By Mary Jo Putney Madeline Hunter Sabrina Jeffries

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For fans of holiday romance magic steal away with the reigning queens of Regency romance--plus one or two dukes, an heiress, and a headstrong beauty--to a surprise snow storm, the comfort of a blaz...

Dearly Beloved

By Mary Jo Putney

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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.