Esther M. Friesner Books

Esther Friesner's fanbase is growing. Readers who love girl-centric teen fantasy/adventure are happily following her from ancient Greece to ancient Egypt and beyond.Overnight, every aspect of Nefer...

Spirit's Chosen

By Esther M. Friesner

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From princess to slave in the blink of an eye. . . .Himiko's world is falling apart. An attack by a rival clan, the Ookami, has left many from her tribe dead or enslaved. Amid the chaos and fear, H...

Nobody s princess

By Esther M. Friesner

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Determined to fend for herself in a world where only men have real freedom, headstrong Helen, who will be called queen of Sparta and Helen of Troy one day, learns to fight, hunt, and ride horses wh...

Nobody s princess

By Esther M. Friesner

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Nobody s Prize

By Esther M. Friesner

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Still longing for adventure, Princess Helen of Sparta maintains her disguise as a boy to join her unsuspecting brothers as part of the crew of the Argo, the ship commanded by Prince Jason in his qu...

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.