Susan Heinrichs Gray Books

Hypertext and the technology of conversation

By Susan Heinrichs Gray

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Paleontology the study of prehistoric life

By Susan Heinrichs Gray

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Presents general information about paleontologists, what they learn about prehistoric animals and vegetation by studying them.

Mako sharks

By Susan Heinrichs Gray

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"With their powerful jaws and sharp teeth, sharks are some of the fiercest predators alive. Look inside to learn about these amazing ocean animals, including their physical traits, habitats, food s...

Bats

By Susan Heinrichs Gray

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The Atlantic Ocean

By Susan Heinrichs Gray

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Describes features of thh Atlantic Ocean, including its icebergs, the area known as the Sargasso Sea, and such inhabitants as eels and dolphins.

The Pacific Ocean

By Susan Heinrichs Gray

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Specifically discussing the Pacific Ocean, provides basic information about the sea, including wave formation, currents, tides, marine biology, and the landscape of the ocean floor.

Germany

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Germany True Books

By Susan Heinrichs Gray

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Bats New True Books

By Susan Heinrichs Gray

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Dinosaur Dig

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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.