John Deathridge Books

A superb new translation of one of the greatest nineteenth century poems: the libretto to Wagner’s Ring Cycle, in a Penguin Classics hardcover designed by Coralie Bickford-SmithThe scale and grande...

Ring of the Nibelung

By John Deathridge, Richard Wagner

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German Opera

By John Warrack, Tim Carter, Arthur Groos, John Deathridge, James Hepokoski

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Opera and Drama in Eighteenth Century London

By Tim Carter, Arthur Groos, John Deathridge, Ian Woodfield, James Hepokoski

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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.