Theodora Keogh Books

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By Theodora Keogh

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My Name Is Rose

By Theodora Keogh

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Gemini the Marriage

By Ann Bannon, Theodora Keogh

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Other Girl

By Theodora Keogh

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The Tattooed Heart & My Name is Rose

By Theodora Keogh

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The Tattooed Heart finds June Grey dreaming a summer alone with her grandmother in a large isolated house at Grey's Neck on the Long Island shore. Wooded hills surround the house and gives way to b...

The Tattooed Heart & My Name is Rose

By Theodora Keogh

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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.