Mark Bellomo Books

Ultimate Guide to G. I. Joe 1982 1994

By Mark Bellomo

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Ultimate Guide to Vintage Star Wars Action Figures 1977 1985

By Mark Bellomo

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The Ultimate Guide to Vintage Transformers Action Figures

By Mark Bellomo

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Ultimate Guide to G. I. Joe 1982 1994

By Mark Bellomo

Average: 0.00, 0 Ratings

Ultimate Guide to Vintage Star Wars Action Figures 1977 1985

By Mark Bellomo

Average: 0.00, 0 Ratings

Totally tubular 80s toys

By Mark Bellomo

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Explores popular toys from the 1980s, providing descriptions and photographs; and includes lists of social events, history, movies, television programs, and music from each year of the decade.

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.