Michael Jeffries Books

Freshwater Ecology Principles and Applications

By Michael Jeffries, Derek Henry Mills, Mike J. Jeffries

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Know your body

By Michael Jeffries

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Inventors and inventions

By Michael Jeffries

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Discusses the accomplishments of men and women who have given us important inventions in such areas as industry and commerce, weapons and warfare, and communication.

Freshwater ecology

By Mike J. Jeffries

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Inventors and Inventions

By Michael Jeffries, Gary A. Lewis

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A Family s Heartbreak

By Michael Jeffries And Dr. Joel Davies

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A Family’s Heartbreak: A Parent’s Introduction to Parental Alienation, is the true story of one parent’s struggle to maintain a normal, loving relationship with his young son in the face of overwhe...

Changing Wills

By Michael Jeffries

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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.