Gertrude Chandler Warner Books

A Present for Grandfather

By Daniel Mark Duffy, Gertrude Chandler Warner

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The mystery of the hot air balloon

By Gertrude Chandler Warner

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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.

The Mystery of the Stolen Boxcar

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The Boxcar Children Books 37 40

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The mystery of the hidden painting

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The Growling Bear Mystery The Boxcar Children

By Gertrude Chandler Warner

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The Mystery at Peacock Hall

By Gertrude Chandler Warner

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The Magic Show Mystery Boxcar Children Series The Early Reader 4

By Gertrude Chandler Warner

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Mystery in the sand

By Gertrude Chandler Warner

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A friendly writer with a metal detector, the mysterious inhabitants of a tower house, and the discovery of a locket in the sand are ingredients for the Aldens' latest mystery.

The Boxcar Children Tree House Mystery 14

By Gertrude Chandler Warner

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Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years.

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.