Gertrude Chandler Warner Books

Schoolhouse Mystery

By Gertrude Chandler Warner

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Recounts the adventures of the Alden children as they solve the mystery of the old schoolhouse in Port Elizabeth.

Boxcar Children Snowbound Mystery

By Gertrude Chandler Warner

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Mystery Behind the Wall

By Gertrude Chandler Warner

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A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

Mountain top mystery

By Gertrude Chandler Warner

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The Alden children start out on a one-day mountain climbing excursion that becomes very exciting. They unearth some mysteries and some treasure and have a good time in the process.

The Lighthouse Mystery

By Gertrude Chandler Warner

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The Children spend the summer at a lighthouse, where a mysterious woman walks the beach.

The Boxcar Children Houseboat Mystery 12

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Caboose Mystery

By Gertrude Chandler Warner

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The children and their grandfather spend the summer traveling on a train--in their own caboose.

Bicycle mystery

By Gertrude Chandler Warner

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While on a bicycle trip to their aunt's farm, the four Aldens help solve a mystery.

Benny Uncovers a Mystery

By Gertrude Chandler Warner

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Two brothers take summer jobs at a department store where a series of peculiar events brings them under suspicion.

Boxcar Children Bus station mystery

By Gertrude Chandler Warner

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The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

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.