John H. Walter Books

The B-conjecture

By John H. Walter

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Inborn Metabolic Diseases

By John H. Walter, Georges Van Den Berghe, Jean Marie Saudubray

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This book is a cohesive and authoritative work covering the fast-growing field of inborn errors of metabolism. In their preface, the editors refer readers to the latest edition of Molecular and Met...

Inborn Metabolic Diseases

By John H. Walter, Georges Van Den Berghe, Jean Marie Saudubray, John Fernandes

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Inborn metabolic diseases

By Georges Van Den Berghe, John Walter, J. M. Saudubray

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Inborn Metabolic Diseases

By Angels Garcia Cazorla, John H. Walter, Jean Marie Saudubray, Matthias R. Baumgartner

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Inborn Metabolic Diseases

By John H. Walter, Jean Marie Saudubray, Matthias R. Baumgartner

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Inborn Metabolic Diseases

By John H. Walter, Jean Marie Saudubray, Matthias R. Baumgartner

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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.