Gertrude Warner Books

The mystery of the hot air balloon

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Benny wants adventure and finds it as he and the other Alden children help uncover the plan of those who would prevent ballooning from coming to Lloyd's Landing.

Mystery Ranch

By Gertrude Chandler Warner

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The Boxcar Children, now living with their grandfather, spend the summer on their Aunt Jane's ranch. Their aunt seems quite unhappy until at the end of the summer a surprise discovery brings happin...

The Yellow House Mystery

By Gertrude Chandler Warner, Gertrude Warner

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Relates the exploits of the four Alden children as they locate a missing man

Surprise Island

By Gertrude Chandler Warner

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The Mystery of the Missing Cat

By Gertrude Chandler Warner

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The mysterious disappearance of a reclusive neighbor's cat involves the Boxcar children in some complicated detective work.

The Mystery on Stage Boxcar Children Series The 43

By Gertrude Chandler Warner

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Black Pearl Mystery 64

By Gertrude Chandler Warner

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Mystery in the Old Attic

By Gertrude Chandler Warner

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Mystery on the Ice 1

By Gertrude Chandler Warner

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The Mystery at the Ballpark

By Gertrude Chandler Warner

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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.