Ken Ludwig Books

How to Teach Your Children Shakespeare

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A foolproof, enormously fun method of teaching your children the classic works of William Shakespeare, by a Tony Award–winning playwright—now featuring two new chapters “You and your children will...

Twentieth Century

By Ben Hecht, Charles MacArthur, Ken Ludwig

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Hapgood

By Tom Stoppard, Ken Ludwig

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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.

Ken Ludwig Books

How to Teach Your Children Shakespeare

Twentieth Century

Leading Ladies

Shakespeare in Hollywood

Lend me a tenor

Postmortem

Hapgood

The Games Afoot

Ken Ludwig s Baskerville

Ken Ludwig s Sherwood

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

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