John Leslie Books

Universes

By John Leslie, Leslie John

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Descobertas e aventuras nos mares e regiSoes polares

By John Leslie

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Damaged Goods

By John Leslie, Leslie John

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Killing Me Softly

By John Leslie, Leslie John

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The End of the World: The Science and Ethics of Human Extinction

By John Leslie, Leslie John

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Nuclear war, holes in the ozone layer, disease, genetic engineering, asteroids and supernovas - any of these may bring human history to an end. But are we in imminent danger of extinction? John Les...

The End of the World: The Science and Ethics of Human Extinction

By John Leslie, Leslie John

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Elements of Geometry, and Plane Trigonometry: With an Appendix, and Very Copious Notes and Illustrations

By John Leslie

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Aging Memory: Make Your Aging Memory Sharp as a Tack!

By John Leslie

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The Philosophy of Arithmetic: Exhibiting a Progressive View of the Theory and Practice of Calculation, with Tables for the Multiplication of Numbers As Far As One Thousand

By John Leslie

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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.