Kevin Clarke Books

Spartacus Berlin Gay Guide 2016

By Kevin Clarke, Ronny Matthes

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Der unsichtbare Korper The invisible body

By Kevin Clarke

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So You Want to be a Landlord eh

By Kevin Clarke

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In BEARDS, Kevin Clarke, bestselling author of PORN - FROM ANDY WARHOL TO X-TUBE, shows us beards from the gay perspective. In addition to his view on the clones of the 1970s and their recent retur...

Oscar Romero

By Kevin Clarke

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The Red Couch

By Horst Wackerbarth, Kevin Clarke, William Least Heat Moon

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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.