David A. Poulsen Books

The vampire gang war is still raging and when the "good guys" discover that their sacred book has been stolen, they appeal to Salt and Pepper to help them get it back--but it will mean going where...

No Time Like the Past

By David A. Poulsen

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Salt and Pepper win first place in an essay competition and win an awesome prize -- a trip to an archaeological dig in New Mexico. Before the teenaged duo leave home, they learn that one of the sit...

Lawrence High

By David A. Poulsen

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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.