Helen Gustafson Books

Dinner's ready, Mom

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Offers simple menus and step-by-step instructions for a variety of dinner dishes that may be prepared by children alone. Also discusses basic cooking techniques and equipment.

Candida directory

By Helen Gustafson

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A Cup of Tea Signature Vertical Note Cards

By Helen Gustafson

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Hanky Panky

By Jonathan Chester, Helen Gustafson

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Candida albicans, in its benign state, lives quietly within our bodies. But when confronted with wide-spectrum antibiotics, birth control pills, steroids, and a sugar-rich diet, this yeast can prol...

The Green Tea User s Manual

By Helen Gustafson

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The reluctant cook

By Helen Gustafson, Helen B. Gustafson

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The agony of the leaves

By Helen Gustafson

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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.