Mark Gruenwald Books

STEM Calculus First Edition Wiley E Text Reg Card

By Mark Gruenwald, Dave Dwyer

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Captain America Epic Collection

By Kieron Dwyer, Mark Gruenwald

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Thing

By Ralph Macchio, Mark Gruenwald

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"Complete your collection of the classic adventures of Marvel's legendary lycanthrope! But can even Jack Russell survive when he battles the silver-clad stalker known as Moon Knight? There are plen...

Quasar

By Mark Gruenwald

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Avengers Epic Collection

By Mark Gruenwald, Roy Thomas, Len Kaminski, Bob Harras

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Captain America Epic Collection

By Fabian Nicieza, Mark Gruenwald

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Marvel Masterworks

By Mark Gruenwald, David Michelinie, Roger Stern, Steven Grant

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Official Handbook of the Marvel Universe

By Peter Sanderson, Various Various, Mark Gruenwald, Steve Saffel

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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.