Harry G. Allard Books

To avoid a visit from boring Uncle Carbuncle, the Stupids take off in the family plane but end up meeting even more stupid relatives in their travels.Publishers WeeklyAllard and Marshall are more t...

The Stupids Take Off

By Harry G. Allard

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Miss Nelson Is Missing Book Cassette.

By Harry G. Allard

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La senorita Nelson ha desaparecido

By Harry G. Allard

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Miss Nelson Is Missing!

By Gene Zion, Marjorie Flack, Virginia Lee Burton, Harry G. Allard Jr., Harry Allard, Harry G. Allard

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Miss Nelson is missing! Miss Nelson was the nicest teacher in the school. She never yelled and she gave the easiest assignments. She was always smiling and cheery, even when her students cut up in...

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.