Gertrude Chandler Warner Books

The Boxcar Children 22 The Animal Shelter Mystery

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

The Boxcar Children Books No. 13 16 Boxset

Average: 0.00, 0 Ratings

The Old Motel Mystery

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

Someone is trying to put Aunt Jane's motel out of business, but the Alden children aren't going to let that happen.

The mystery of the mixed up zoo

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

The Alden children investigate various mix-ups at a zoo run by their grandfather's friend in an effort to save it not only from pranksters but also from the town council.

Mystery Girl

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

The mystery cruise

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

While on a cruise with their grandfather, the Alden children help discover who is behind the mysterious troubles of the ship--disconnected phone lines, engine trouble, a man overboard--and still ha...

The mystery in the snow

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

When the Alden children accompany their grandfather to the Snow Haven Lodge, a series of odd occurrences threaten to disrupt the annual winter games.

The Pizza Mystery

By Gertrude Chandler Warner

Average: 0.00, 0 Ratings

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.