David Leffman Books

'Hong Kong & Macau' is your essential guide to these two incredible regions; covering all the key sights, hotels, restaurants, shops and bars you need to know about. Slim, stylish and utterly pocke...

Top 10 Iceland

By David Leffman

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"DK Eyewitness Top 10 Travel Guide: Iceland will lead you straight to the very best on offer. Whether you're looking for the things not to miss at the Top 10 sights, or want to find the best nights...

Top 10 Iceland

By David Leffman

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Chinese Confessions of Charles Welsh Mason

By David Leffman, Charles Welsh Mason

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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.