Helene Books

State of the art
State of the art

By David Shimkin

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The Era of Charlemagne
Swimming
Swimming

By Helene Boudreau

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Describes how swimmers use new technologies to achieve faster times. Explains how swimmers use high-tech body suits to overcome drag as they glide through the water, and how energy gels and sports...

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Cat Chat
Cat Chat

By Helene Thornton

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Oliver Twist by Charles Dickens
The Book of Promethea
The Book of Promethea

By Helene Cixous

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Generations past
Generations past
Aid to developing nations Eurobarometer
Your Days Are Numbered in Calendar Math
Your Days Are Numbered in Calendar Math

By Helene Silverman, Sheila Siderman

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"Early math concepts and number computaion are closely tied together in this sequential, eleven chapter book for teaching the calendar."

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Related Articles from our Blog

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.

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