Michael J. Vassallo Books

Marvel Masterworks Atlas Era Menace

By Marvel Comics, Michael J. Vassallo

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Marvel Masterworks

By Marvel Comics, Michael J. Vassallo

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Atlas at war

By Allan Harvey, Michael J. Vassallo

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"Atlas at War! collects fifty hard-hitting stories from Atlas Comics, the company that became Marvel Comics and published more war titles than anyone in the industry between the years 1951 and 1960...

Atlas at war!

By Allan Harvey, Michael J. Vassallo

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Joe Maneely

By Joe Maneely, Michael J. Vassallo

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Atlas Comics Library No. 2

By Michael J. Vassallo, Bill Everett

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Atlas Comics Library No. 3

By Joe Maneely, Mike Sekowsky, Hank Chapman, Michael J. Vassallo

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Atlas Artist Edition No. 2

By Al Williamson, Michael J. Vassallo

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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.