Paul Koudounaris Books

Memento mori

By Paul Koudounaris

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Guillermo del Toro

By Paul Koudounaris, Keith McDonald, Clark Roger, Matthew Welch, Britt Salvesen, Jim Shedden, Guy Davis

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Faithful unto Death

By Paul Koudounaris

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The Empire of Death

By Paul Koudounaris

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Heavenly Bodies Cult Treasures and Spectacular Saints from the Catacombs

By Paul Koudounaris

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This book is the chronicle of a group of extraordinary skeletons discovered in the Roman Catacombs in the late sixteenth century. Largely anonymous, they were nevertheless held to be the remains of...

Memento Mori

By Paul Koudounaris

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Cat s Tale

By Paul Koudounaris, Baba The Cat

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Cat s Tale

By Paul Koudounaris

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Guillermo Del Toro

By Paul Koudounaris, Jim Shedden, Keith McDonald, Clark Roger, Kaywin Feldman

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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.