Janet Ahlberg Books

A Jolly Postman delivers letters to several famous fairy-tale characters such as the Big Bad Wolf, Cinderella, and the Three Bears. Each letter may be removed from its envelope page and read separa...

The Jolly Christmas Postman

By Janet Ahlberg, Allan Ahlberg

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Bye Bye, Baby: A Sad Story With a Happy Ending

By Janet Ahlberg, Allan Ahlberg

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A baby with an aggressive nature who lives alone manages to acquire a mommy, a daddy, and several other acquaintances to live with him.

The Jolly Postman

By Janet Ahlberg

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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.