Paul Leonard Books

Venusian Lullaby Dr Who the Missing Adventures

By Paul Leonard

Average: 0.00, 0 Ratings

Decalog 5 Wonders

By Jim Mortimore

Average: 0.00, 0 Ratings

Short Trips Doctor Who Series

By British Broadcasting Corporation, Stephen Cole

Average: 0.00, 0 Ratings

Product DescriptionAn adventure featuring the Eighth Doctor with Fitz and Anji. The heroes are used to finding themselves in different times, eras long before or long after the ones into which they...

The Turing Test

By Paul Leonard

Average: 0.00, 0 Ratings

Revolution Man

By Paul Leonard

Average: 0.00, 0 Ratings

It's swinging London, 1968. The Tardis crew are investigating an anarchist set using a drug that seems of an extra-terrestrial nature and how it connects to a series of bizarre, violent events worl...

Earth and Beyond

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.