Gertrude Chandler Warner Books

The Outer Space Mystery

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The Boxcar children investigate the disappearance of a student's research paper from an observatory and the subsequent disappearance of another student.

The Outer Space Mystery

By Gertrude Chandler Warner

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Grandfather is moderating an astronomy convention at a college in the West Virginia mountains, and the Aldens tag along. They're excited to learn about a student's big discovery, but then his work...

The Hockey Mystery

By Gertrude Chandler Warner

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When a professional hockey player comes to Greenfield with plans to build an ice skating rink, the Alden children suspect that someone in town wants to stop the project.

The Hockey Mystery

By Gertrude Chandler Warner

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Kevin Reynolds, the Aldens' favorite hockey star, plans to build a new ice rink in Greenfield and invites Jessie to join his new girls hockey team. But equipment goes missing and Kevin's blueprints...

The Panther Mystery

By Gertrude Chandler Warner

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The Aldens travel to the Florida Everglades to search for a missing park ranger who studies the endangered Florida panther. But even with the help of a Miccosukee girl from the local village, they...

The Panther Mystery

By Gertrude Chandler Warner

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The Aldens travel to the Florida Everglades to search for a missing park ranger who studies the endangered Florida panther. But even with the help of a Miccosukee girl from the local village, they...

The Home Run Mystery

By Gertrude Chandler Warner

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The Aldens discover that one of Pikesville's little league coaches has been cheating all season, which is somehow related to a plan to raze the town's historic baseball field.

The Home Run Mystery

By Gertrude Chandler Warner

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While visiting Pikesville, New York, the Boxcar Children join the exciting last games of the season in a strange old ballpark behind an abandoned factory. The Pikesville Half Moons are playing the...

The Honeybee Mystery

By Gertrude Chandler Warner

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The Aldens help a farmer whose honeybees have stopped producing honey and discover a sabotage scheme.

The Honeybee Mystery

By Gertrude Chandler Warner

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The Alden family makes an annual trip to the Sherman farm to stock up on delicious fresh honey only to discover that there is a honey shortage! The Aldens help the Shermans look for clues around th...

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.