Gerald Secor Couzens Books

AstroFit

By Gerald Secor Couzens, William J. Evans

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Viagra

By Steven Lamm, Gerald Secor Couzens

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Stronger

By Steven Lamm, Gerald Secor Couzens

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Stronger LP

By Steven Lamm, Gerald Secor Couzens

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The Core Program

By Gerald Secor Couzens, Peggy Brill

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Introducing the fitness program designed by a physical therapist exclusively for women — proven to increase strength, tone muscles and reduce aches and pains in just 15 minutes a day!Few women real...

Asthma Exercise

By Nancy Hogshead, Gerald Secor Couzens

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Whole Life Prostate Book

By H. Ballentine Carter, Gerald Secor Couzens

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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.