Mark Williams Books

The evolution of skeletons enabled an unprecedented array of bodies to evolve, from the tiniest seed shrimp to dinosaurs and blue whales. This book explores the incredible variety of skeletons in n...

Fiery Shapes: Celestial Portents and Astrology in Ireland and Wales, 700-1700

By Mark Williams

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The presentation of the magical and mantic in Celtic literature has persistently been dogged by misunderstanding and over-romanticized readings. Among the misconceptions about the ancient and medie...

The Goldilocks Planet: The 4 billion year story of Earth's climate

By J. A. Zalasiewicz

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Ocean Worlds: The story of seas on Earth and other planets

By J. A. Zalasiewicz

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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.