G. Brian Karas Books

El ascensor magico

By G. Brian Karas, Murphy Stuart J.

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Like Butter on Pancakes

By G. Brian Karas, Jonathan London

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Atlantic

By G. Brian Karas

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Lapping at the sandy shores, stretching from the North Pole to the South Pole and from North America to Africa, the Atlantic Ocean is constantly changing shape and size and is always traveling. It...

On Earth

By G. Brian Karas

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Perfect for Earth Day!Climb aboard a giant spaceship . . . the Earth! In glorious art, G. Brian Karas illuminates our Earth and its cycles and does a brilliant job of making the concepts of rotatio...

A Poem in Your Pocket

By G. Brian Karas, Margaret McNamara

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7 x 9 Trouble

By G. Brian Karas, Claudia Mills

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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.

On earth

By G. Brian Karas

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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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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.