Mark Oppenheimer Books

Thirteen and a Day

By Mark Oppenheimer

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Wisenheimer

By Mark Oppenheimer

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Frank and comical, "Wisenheimer "chronicles the travails of a hyperarticulate child who finds salvation in the heady world of competitive oratory.

Knocking on Heaven s Door

By Weissman David

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Squirrel Hill

By Mark Oppenheimer

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A piercing portrait of the struggles and triumphs of one of America's renowned Jewish neighborhoods in the wake of unspeakable tragedy that highlights the hopes, fears, and tensions all Americans m...

Squirrel Hill

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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.