Mark C. Perry Books

Aftermath: Thieves' World, Book 10

By Mark C. Perry, John Brunner, Janet E. Morris, DAVID DRAKE, Lynn Abbey, Andrew J. Offutt, Robert Asprin, Robert Lynn Asprin

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Tempus and the Stepsons abandon the embattled city of Sanctuary as rival factions emerge and a vicious power struggle begins, in a collection of interrelated fantasy tales by Janet Morris, John Bru...

Morigu: The Desecration

By Mark C. Perry, Copyright Paperback Collection (Library Of Congress), Perry, Mark C

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"Trell'dem the Emperor, Lonnlarcan the High King of the Elves, and Mearead, the dwarf king, all agree that only the Morigu, an invincible warrior, can save them from the Dark Lord's evil forces"--P...

Morigu: The Dead

By Mark C. Perry

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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.