Wendy Pfeffer Books

From Seed to Pumpkin

By Wendy Pfeffer

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Wiggling Worms at Work

By Wendy Pfeffer

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The Shortest Day

By Wendy Pfeffer

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The science, history, and cultural significance of the shortest day of the year: The Winter Solstice!The beginning of winter is marked by the solstice, the shortest day of the year. Long ago, peopl...

The Longest Day: Celebrating the Summer Solstice

By Wendy Pfeffer

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Three Medieval Views of Women: La Contenance des Fames, Le Bien des Fames, Le Blasme des Fames

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Songs of the Women Trouveres

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Marta's magnets

By Wendy Pfeffer

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Marta's sister Rosa calls her magnet collection junk, but Marta's magnets help her make friends in her new home and help her retrieve a lost key for Rosa's new friend.

Marta's magnets

By Wendy Pfeffer

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Marta's sister Rosa calls her magnet collection junk, but Marta's magnets help her make friends in her new home and help her retrieve a lost key for Rosa's new friend.

Marta's magnets

By Wendy Pfeffer

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Marta's sister Rosa calls her magnet collection junk, but Marta's magnets help her make friends in her new home and help her retrieve a lost key for Rosa's new friend.

Arctic Wolves Creatures in White

By Wendy Pfeffer

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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.