Charles P. Graves Books

Biography of an explorer, naturalist, writer, founder of the Sierra Club, and early proponent of wilderness preservation who was influential in establishing our national park system.

John F. Kennedy Discovery Biographies

By Charles P. Graves

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Annie Oakley, the shooting star

By Charles Parlin Graves

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Marco Polo A World Explorer Book

By Charles P. Graves

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Matthew Henson

By Charles P. Graves, Ronald Dorfman

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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.