Debra Doyle Books

By honor betray d

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In the third of the Mageworlds trilogy, Galcen has fallen, the Space Force is scattered and the planets of the former Republic rush to make peace with the victorious Mages. Beka Rosselin-Metadi, th...

School of wizardry

By Debra Doyle

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Determined to become a wizard, twelve-year-old Randal is delighted to be accepted into the famed School of Wizardry, but his apprenticeship is marred when he realizes that one of the master wizards...

Tournament and tower

By Debra Doyle

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After breaking the oldest law in wizardry while trying to save the School of Wizardry from destruction, fifteen-year-old Randal is made a journeyman wizard but is not allowed to use his magic, no m...

The city by the sea

By Debra Doyle

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A legacy from a dying stranger sends fifteen-year-old journeyman wizard Randal on a dangerous journey to find the rightful place of an artifact of power, which tempts him to succumb to its tainted...

The city by the sea

By Debra Doyle

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A legacy from a dying stranger sends fifteen-year-old journeyman wizard Randal on a dangerous journey to find the rightful place of an artifact of power, which tempts him to succumb to its tainted...

The Prince's players

By Debra Doyle

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A fifteen-year-old journeyman wizard needs all the magic he has thus far learned when he and his companion Lys are drawn into the political problems of a good and powerful prince.

The prisoners of Bell Castle

By Debra Doyle

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Randal, a journeyman wizard, jeopardizes his powers when he joins Baron Ector's armies in a siege of Bell Castle.

The high king's daughter

By Debra Doyle

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The further adventures of Roland, a journeyman wizard, and his two companions, the knight-errant Walter and the minstrel Lys, as they journey into Elfland to try and bring out the High King's daugh...

The Long Hunt

By Debra Doyle, James D. Macdonald

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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.