Gretchen Woelfle Books

Wind at Work

By Gretchen Woelfle

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Wind at Work

By Gretchen Woelfle

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Wind at Work

By Gretchen Woelfle

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Wind at Work

By Gretchen Woelfle

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Answering the Cry for Freedom

By Gretchen Woelfle Illustrated By R. Gregory Christie

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Uncover the lives of thirteen African-Americans who fought during the Revolutionary War.   Even as American Patriots fought for independence from British rule during the Revolut...

How Benjamin Franklin Became a Revolutionary in Seven (Not-So-Easy) Steps

By Gretchen Woelfle Illustrated By John O Brien

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How did Ben Franklin become an outspoken leader of the American Revolution? Learn all about it in seven (not-so-easy) steps in this humorous, accessible middle-grade chapter book that focuses on Be...

How Benjamin Franklin Became a Revolutionary in Seven (Not-So-Easy) Steps

By Gretchen Woelfle Illustrated By John O Brien

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A Take-Charge Girl Blazes a Trail to Congress

By Gretchen Woelfle Illustrated By Rebecca Gibbon

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For take-charge girls in the making and fans of I Dissent and Kamala Harris: Rooted in Justice, this is the story of Jeannette Rankin, the first US congresswoman.Jeannette Rankin was always a take-...

A Take-Charge Girl Blazes a Trail to Congress

By Gretchen Woelfle Illustrated By Rebecca Gibbon

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The wind at work

By Gretchen Woelfle

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An introduction to windmills and their advantages as renewable energy providers, with activities for understanding some of the principles of wind.

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.