Jahn, Ryan David, Author Books

Dark Hours

By Ryan David Jahn, Jahn, Ryan David, Author

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Private Investigator Damien Lamb: a man hardened by life and seeking justice against those who have wronged society. When the vulnerable Abigail walks into his office asking Lamb to retrieve her da...

The Gentle Assassin

By Ryan David Jahn, Jahn, Ryan David, Author

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It wasn't every day you had the chance to track down the man who'd killed your mother. In 1964, Andrew Combs' mother is killed in front of him. His father Harry vanishes soon afterwards. Twenty-six...

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.