John C. George Books

Pocket guide to the outdoors

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This guide to the outdoors provides advice and instructions on camping, building shelters, finding water, and cooking outdoors. Some activities may require adult supervision.

Laboratory Experiments in Biology

By John C. George

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Educational Crossword Puzzles in Biology Educational Crossword Puzzles

By John C. George

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Pancyclic and Bipancyclic Graphs

By W.D. Wallis, John C. George, Abdollah Khodkar

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Games Greeks Play

By John C. George

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Introduction to Combinatorics

By Walter D. Wallis, John C. George

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Introduction to Combinatorics

By Walter D. Wallis, John C. George

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Introduction to Combinatorics

By Walter D. Wallis, John C. George

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Introduction to Combinatorics

By Walter D. Wallis, John C. George

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Introduction to Combinatorics

By Walter D. Wallis, John C. George

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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.