J. Robert King Books

Mad Merlin

By J. Robert King

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Carnival of fear.

By J. Robert King

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Rogues to Riches

By J. Robert King

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Lancelot du Lethe

By J. Robert King, Andre Norton

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"Witch World: Simon Tregarth, a man from our own world, escapes his doom through the gates to the Witch World. There he aids the witch Jaelithe's escape from the hounds of Alizon, only to find hims...

The Shadow of Reichenbach Falls

By J. Robert King

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Lancelot Du Lethe Mad Merlin

By J. Robert King

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Summerhill hounds

By J. Robert King

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Realms of magic

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Blood hostages

By J. Robert King

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Realms of the Underdark

By J. Robert King, Copyright Paperback Collection Library Of Congress

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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.