Mary Winn Heider Books

Unicorns Who Saved Christmas

By Mary Winn Heider

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Stupendous Switcheroo

By Mary Winn Heider

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The Stupendous Switcheroo

By Chad Sell, Mary Winn Heider

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What would happen if you woke up every single day with a different, surprise SUPERPOWER?! Find out in this zany, hilarious illustrated novel from Mary Winn Heider and Chad Sell.The morning of his m...

The Stupendous Switcheroo 2: Born to Be Bad

By Chad Sell, Mary Winn Heider

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Switch and his heroic crew of rag-tag, superpowered kids are back! And this highly illustrated sequel has one mission: Operation Jailbreak (to Rescue the Parents who were Wrongfully Jailed by...

The Stupendous Switcheroo 2: Born to Be Bad

By Chad Sell, Mary Winn Heider

Average: 0.00, 0 Ratings

Switch and his heroic crew of rag-tag, superpowered kids are back! And this highly illustrated sequel has one mission: Operation Jailbreak (to Rescue the Parents who were Wrongfully Jailed by...

The Stupendous Switcheroo 3: Can't Go Home Again

By Chad Sell, Mary Winn Heider

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The heroic cast of rag-tag, superpowered kids are back! In this third installment of the highly illustrated series, can the Stupendous Switcheroo change his fate from #1 undesirable prisoner to top...

The Stupendous Switcheroo 3: Can't Go Home Again

By Chad Sell, Mary Winn Heider

Average: 0.00, 0 Ratings

The Stupendous Switcheroo

By Chad Sell, Mary Winn Heider

Average: 0.00, 0 Ratings

What would happen if you woke up every single day with a different, surprise SUPERPOWER?! Find out in this zany, hilarious novel from Mary Winn Heider and Chad Sell.The morning of his mom's busines...

The Stupendous Switcheroo 3: Can't Go Home Again

By Chad Sell, Mary Winn Heider

Average: 0.00, 0 Ratings

The heroic cast of rag-tag, superpowered kids are back!In this third installment of the series, can the Stupendous Switcheroo change his fate from #1 undesirable prisoner to top student at the Valo...

The Stupendous Switcheroo 2: Born to Be Bad

By Chad Sell, Mary Winn Heider

Average: 0.00, 0 Ratings

Switch and his heroic crew of rag-tag, superpowered kids are back! And this sequel has one mission: Operation Jailbreak (to Rescue the Parents who were Wrongfully Jailed by a Hero who Might Ac...

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.