Barker Gummere Books

Streetcars of New Jersey Vol. II

By Barker Gummere

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New Jersey Trolleys in Color

By Joseph F. Eid, Donna Hay

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Streetcars of New Jersey

By Barker Gummere, Joseph F. Eid Jr.

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This is Volume III of a 3 volume set. It chronicles the history of Streetcars in New Jersey, from the first horsecars to the modern trolleys and light-rail cars. this volume covers the Metropolitan...

Trolleys of Bucks County Pennsylvania

By Barker Gummere, Harry Foesig, Harold E. Cox

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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.