Rita Gelman Books

Dawn to dusk in the Galapagos

By Rita Golden Gelman

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Text and photographs explore the vast array of unusual creatures still to be found in the Galapagos Islands.

Ufo Encounters

By Rita Gelman, Rita Golden Gelman

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Great quarterbacks of pro football

By Mitch Gelman, Rita Gelman

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Stop those painters

By Rita Gelman, Rita Golden Gelman

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Two zany painters paint everything in sight, including grass, bees, teachers, and planes.

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.