Alan Jefferson Books

Assault on the guns of Merville

By Alan Jefferson

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The complete Gilbert and Sullivan opera guide.

By Alan Jefferson

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The complete Gilbert & Sullivan opera guide

By Alan Jefferson

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Provides anecdotes and a synopsis of all 14 operas as well as the complete libretto of each opera.

Inside the orchestra.

By Alan Jefferson

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Elisabeth Schwarzkopf

By Alan Jefferson

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Internationally renowned as the finest Mozart and Strauss soprano since World War II, Elisabeth Schwarzkopf was a preeminent performer in both opera and Lieder for three decades. She is as popular...

Physical Interventions

By John Harris, Alan Jefferson, David Allen, Richard Mills, Marion Cornick

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The Glory of Opera 06142

By Alan Jefferson

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Glory of Opera

By Alan Jefferson

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Music in Germany

By Alan Jefferson

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The Glory of Opera

By Alan Jefferson

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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.