Justin Segal Books

The American Sign Language Puzzle Book

By Justin Segal

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The American Sign Language Puzzle Book Volume 2

By Justin Segal

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Presidents almanac

By Paula N. Kessler

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Presents facts and anecdotes about the personal lives, families, duties, and more of American presidents from George Washington through Bill Clinton.

The amazing space almanac

By Justin Segal

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Discusses the many aspects of space, including the origin and nature of the universe, the history of space travel, quarks, quasars, black holes, and extraterrestrials.

The Presidents Almanac Prepack

By Justin Segal, Paula N. Kessler

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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.