Gertrude Chandler Warner Books

Surprise Island

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of Surprise Island in the second book in this illustrat...

The Yellow House Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of the yellow house in the third book in this illustrat...

Mystery Ranch

By Gertrude Chandler Warner

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The Aldens spend the summer on their Aunt's ranch! The ranch is a beautiful place, but it's also the source of trouble between Aunt Jane and Grandfather. As the Boxcar Children explore the land, th...

Mike's Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a suspicious house fire in this illustrated chapter...

Blue Bay Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of Blue Bay in this illustrated chapter book series bel...

The Woodshed Mystery

By Gertrude Chandler Warner

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The Boxcar Children visit the old farmhouse where Grandfather and Aunt Jane grew up! But people in the nearby town seem to think something isn't quite right about the house. As the Boxcar Children...

The Lighthouse Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of an old lighthouse in this illustrated chapter book s...

Mountain Top Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a hidden cave in this illustrated chapter book serie...

Schoolhouse Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of an old schoolhouse in this illustrated chapter book...

Caboose Mystery

By Gertrude Chandler Warner

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Four brave siblings were searching for a home – and found a life of adventure! Join the Boxcar Children as they investigate the mystery of a curious train caboose in this illustrated chapter...

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.