Ron Frenz Books

Thor Corps
Thor Corps

By Ron Frenz, Walter Simonson, Tom Defalco

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A Long Time Ago Vol. 5.
A Long Time Ago Vol. 5.

By Jo Duffy

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Spider Girl
Spider Girl

By Tom DeFalco

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What if Peter Parker and Mary Jane had a daughter? The ever-amazing answer is, she'd be May "Mayday" Parker -A.K.A. Spider-Girl! Spinning out of the pages of WHAT IF? into her very own universe, th...

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Fantastic Four Epic Collection
Thor Epic Collection
Star Wars 5
Star Wars 5

By M. Duffy

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Spider Girl Vol.4
Spider Girl Vol.4

By Ron Frenz, Tom DeFalco

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The Official Handbook Of The Invincible Universe
Legacy...in Black And White Spider Girl
Flash num. 09

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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.

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