Gertrude Chandler Warner Books

The Mystery in the Cave

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The Boxcar Children are visiting Dragon Mouth's Cavern. Their plan is to explore the area and go rock hunting. But when Benny finds a way into secret underground caves, the children have even more...

The Mystery on the Ice

By Gertrude Chandler Warner

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The Boxcar Children have an adventure right in Greenfield. It all starts with some special news from Cousins Joe and Alice. Then a figure skating troupe comes to town—and a blizzard, too! Not long...

The Mystery of the Stolen Music

By Gertrude Chandler Warner

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A famous orchestra is coming to town! The Aldens are excited to hear the orchestra play, meet the musicians, and learn how to make their own instruments. They also can't wait to see a very valuable...

Tree 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 a secret window in this illustrated chapter book ser...

The Mystery Bookstore

By Gertrude Chandler Warner

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The Boxcar Children are on a trip to New Orleans to help Grandfather's friend with her bookstore. The children love exploring the city, and they find lots of interesting things in the store. But wh...

The Mystery of the Stolen Boxcar

By Gertrude Chandler Warner

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The Aldens are fixing up the boxcar so they can ride in it for the Founders' Day Parade! There's just one problem: the boxcar has gone missing before the big day...with Watch inside! Can the Boxcar...

The Firehouse Mystery

By Gertrude Chandler Warner

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After the Aldens learn that Grandfather used to be a volunteer firefighter, he takes them on a tour of Greenfield's historic firehouse. Then they hear that the town council wants to tear down the b...

The Mystery on the Train

By Gertrude Chandler Warner

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On a train trip with Aunt Jane from Boston to San Francisco, the Aldens meet a young art student who is worried about making the journey alone.Then their new friend's irreplaceable portfolio is sto...

The Mystery of the Lost Mine

By Gertrude Chandler Warner

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The Aldens take an RV trip to Arizona, where they learn about the Lost Dutchman Mine. An old legend says the mine is filled with gold! When an old prospector goes missing while searching for it, th...

The Mystery of the Secret Message

By Gertrude Chandler Warner

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The Aldens are helping Grandfather prepare for Greenfield's Winter Festival by cleaning a statue of a Revolutionary War hero in the town square. When Violet finds a mysterious message in a photogra...

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.