Pat Olliffe Books

Spider Girl Volume 8

By Tom DeFalco, Pat Olliffe

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Spider Girl Vol. 9

By Tom DeFalco, Pat Olliffe

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Frankenstein

By Pat Olliffe, Martin Powell

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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...

The Mighty Avengers

By Pat Olliffe, Rich Thomas

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52 Aftermath

By Keith Giffen Pat Olliffe John Stanisci

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Los Vengadores Operacion tormenta galactica 2

By Al Milgrom, Pat Olliffe, Tom Defalco

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Los Vengadores Operacion tormenta galactica 3

By Al Milgrom, Pat Olliffe, Tom Defalco

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Games Villains Play

By Ron Frenz, Tom DeFalco, Pat Olliffe

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Spider Man

By Stan Lee, Ross Andru, Tom DeFalco, Jack Kirby, Herb Trimpe, Roy Thomas, Pat Olliffe, Steve Ditko, Ron Wilson, Kurt Busiek

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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.