Johnston Paul Books

Maverick ex-cop Quint Dalrymple returns to investigate a series of gruesome murders in a near-future independent Edinburgh. Independent Edinburgh, 2033. The Council of City Guardians has been force...

The silver stain

By Johnston Paul

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"Hired by a Hollywood film company to trace a missing employee in Crete, private investigator Alex Mavros is plunged into a vortex of hatred. The company is shooting a movie about the invasion of C...

The Green Lady

By Johnston Paul

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"Hired by the wife of one of Greece's richest men to find her missing fourteen-year-old daughter, half Greek, half Scots PI Alex Mavros faces an uphill battle. But he's not the only one looking for...

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.