Gene Szafran Books

Protostars

By Gene Szafran, David Gerrold

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The Puppet Masters

By Gene Szafran, Robert A. Heinlein

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The Door into Summer

By Gene Szafran, Robert A. Heinlein

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Fiorello La Guardia

By Mervyn D. Kaufman

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A biography of the first Italian-American mayor of New York, a man noted for his honesty and dynamism.

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.