Roberts Katherine Books

When an earthquake strikes and the Colossus of Rhodes collapses, humans come face to face with an ancient race of sea creatrues - the telchines. At the centre of the struggle is Aura, half-telchine...

The Cleopatra Curse

By Roberts Katherine

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Yoga for Golfers: A Unique Mind-Body Approach to Golf Fitness

By Roberts Katherine

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Spellfall

By Katherine Roberts, Roberts Katherine

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After twelve-year-old Natalie, unaware of her own powers, is kidnapped by a wizard, she, her stepbrother, and their friends are caught up in the sorcerer's attempt to cross an invisible boundary in...

The Crystal Mask

By Katherine Roberts, Roberts Katherine

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

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.