Seppo Makinen Books

"Return of the Devil" - The many drug addicts of London have fallen victim to a poisonous supply of cocaine, trapping Sherlock Holmes himself within its deadly grip. The Great Detective is submerge...

Sherlock Holmes

By Steven Philip Jones, Seppo Makinen, Rob Davis

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Scarlet in Gaslight

By Seppo Makinen, Martin Powell

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Sherlock Holmes Mysteries Volume 1

By Seppo Makinen, Martin Powell

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Residue analyses of the official testing of pesticides, 1980

By Hilkka Siltanen

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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.