Bill Mantlo Books

Collects Incredible Hulk (1968) #256-265, Incredible Hulk Annual (1968) #10-11, Marvel Super Hero Contest of Champions (1982) #1-3. Bill Mantlo and Sal Buscema take the Hulk around the world! First...

ANT-MAN GIANT-MAN EPIC COLLECTION: ANT-MAN NO MORE

By Stan Lee

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Progenitor of the famous Pym Particle, biochemist Dr. Henry Pym started off his super-heroing career as the tiny Ant-Man, but he soon burst into a new role as Giant-Man! The Avengers co-founder's a...

MARVEL-VERSE: ROCKET & GROOT

By Bill Mantlo

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Rocket and Groot are the most lovable duo in the Marvel-Verse - and these are some of their craziest adventures! Rocket Raccoon blasts his way into action as Guardian of the Keystone Quadrant - jus...

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.