G. Brian Karas Books

On earth

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We are all passengers of the Earth as it spins, tilts and circles the sun. Learn about Earth's cycles of rotation and revolution, plus how they affect our lives through the days and seasons.

Young Zeus

By G. Brian Karas

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The Little Library

By G. Brian Karas, Margaret McNamara

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I Love You Little I Love You Lots

By G. Brian Karas, Douglas Wood

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Houghton Mifflin Harcourt Journeys: Common Core Big Book Unit 4 Book 18 Grade K Atlantic

By HOUGHTON MIFFLIN HARCOURT

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Atlantic

By G. Brian Karas

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Explore what the Atlantic Ocean is, how far it stretches, how the moon affects it, and other characteristics as described by the ocean itself.

Simple Science Says

By Melvin Berger

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Bunny Runs Away School Friends Series

By Bernice Chardiet, G. Brian Karas, Grace Maccarone

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I know an old lady

By G. Brian Karas

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Retells the cumulative tale in which an old lady pays the supreme penalty for her peculiar eating habits.

I know an old lady

By G. Brian Karas

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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.