Roberts Katherine Books

Song Quest The Echorium Sequence 1

By Roberts Katherine

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Songquest

By Roberts Katherine

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On their first journey away from the safety of their island home, two novice Singers learn important lessons when they must confront an evil Khizpriest and stop him from stealing the power of their...

Crystal mask

By Roberts Katherine

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Renn, a novice Singer, and Shaiala, a girl raised by centaurs, battle against a great evil and try to restore harmony to the world.

Dark Quetzal

By Katherine Roberts, Roberts Katherine

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Kyarra, a novice Singer, seeks to destroy evil and learn the truth about her mother and father.

Spellfall

By Roberts Katherine

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Dark Quetzal Echorium Sequence

By Roberts Katherine

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I Am The Great Horse

By Katherine Roberts, Roberts Katherine

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The war horse Bucephalus recounts his adventures from 344-323 B.C. with Alexander the Great and his relationship with a groom who has prophetic dreams.

Key Topics in Psychiatry MRCPSY Study Guides

By Sheena C. Jones, Roberts Katherine

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Crystal Mask Echorium Sequence

By Roberts Katherine

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Spellfall

By Roberts Katherine

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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.