Frank P. Ryan Books

The snowmelt river

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On the summit of the fabled mountain Slievenamon in Ireland there is a doorway to an ancient land of terrible power. The gate of Feimhin has lain closed for centuries, the secret of its opening lon...

The snowmelt river

By Ryan Frank

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The Tower of Bones

By Frank P. Ryan

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Sword of Feimhin

By Frank P. Ryan

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Sword of Feimhin

By Frank P. Ryan

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The Return of the Arinn The Three Powers Book 4

By Frank P. Ryan

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Lessons in Irish Housing

By Frank P. Ryan

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The Sword Of Feimhin

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The return of the Arinn

By Ryan Frank

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Doomsday Genie

By Frank Ryan

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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.