Greg Jenner Books

A Million Years in a Day: A Curious History of Daily Life

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"Who invented beds? When did we start cleaning our teeth? How old are wine and beer? Which came first: the toilet seat or toilet paper? What was the first clock? Every day, from the moment our alar...

Planet X and the Kolbrin Bible Connection

By Greg Jenner

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A Million Years in a Day

By Matthew Lloyd Davies, Greg Jenner

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A Million Years in a Day

By Matthew Lloyd Davies, Greg Jenner

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El Planeta X y La Conexion Con La Biblia Kolbrin

By Maria Teresa Valencia Del Rincon, Greg Jenner, Mar A Teresa Valencia Del Rinc N

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A Million Years in a Day

By Greg Jenner

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A Million Years in a Day Lib E

By Matthew Lloyd Davies, Greg Jenner

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A Million Years in a Day

By Greg Jenner

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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.