John Gassner Books

Introducing the Drama an Anthology

By Ed. Gassner John

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Directions in Modern Theatre and Drama

By John Gassner

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O'Neill: A Collection of Critical Essays

By John Gassner

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Reader s Encyclopaedia of World Drama

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A comprehensive reference work which covers the drama of all five continents from its origins to the present.

Best Plays of the Early American Theater

By John Gassner

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Twenty Five Best Pl Mod Am The

By John Gassner

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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.