Charlie Brennan Books

Here s Where

By Joe Lattal, Charlie Brennan, Bridget Garwitz

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"A guidebook to sites related to famous people in St. Louis, with anecdotes, interesting facts, and cross-references. Each entry is keyed to one of ten maps of the St. Louis area"--Provided by publ...

Amazing St. Louis

By Charlie Brennan

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"Did you know the first mobile phone was used in St. Louis? Or that a St. Louis businessman changed the course of war in the Pacific during World War II? Or that a St. Louisan ended the Cold War? A...

Only in St. Louis

By Charlie Brennan

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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.