Jean F. Blashfield Books

Oxygen

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Presents the basic concepts of oxygen, the most important chemical element in our lives and also the most abundant element in nature.

Hydrogen

By Jean F. Blashfield

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Presents the basic concepts of this central element of the universe.

Nitrogen

By Jean F. Blashfield

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Discusses the origin, discovery, special characteristics, and use of nitrogen in such products as explosives and fertilizers.

Calcium

By Jean F. Blashfield

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Presents the basic concepts of this metallic element which is found in the stone used to make buildings and streets and which is an important mineral needed by the body.

Carbon

By Jean F. Blashfield

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Presents the basic concepts of carbon, one of the most important chemical elements found in all living things.

Sodium

By Jean F. Blashfield

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Discusses the origin, discovery, special characteristics, and uses of the sixth most abundant element in the Earth's crust.

Sparks of Life

By Jean F. Blashfield

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Animal Life Gareth Stevens Vital Science Life Science

By Jean F. Blashfield, Carol Ryback

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Animal Life Gareth Stevens Vital Science Life Science

By Jean F. Blashfield

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Plant Life Gareth Stevens Vital Science Life Science

By Jean F. Blashfield

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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.