John Whalen Books

The World s Greatest Conspiracies History s Biggest Mysteries Cover Ups and Cabals

By John Whalen, Jonathan Vankin

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The Fifty Greatest Conspiracies of All Time

By John Whalen, Jonathan Vankin

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The 60 Greatest Conspiracies of All Time

By Jonathan Vankin

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A feverish feast of the most far-reaching, far-out, and startling conspiracy theories of all time, from the J.F.K. assassination and the Jack the Ripper slayings to the Manson family and the CIA.

The 80 greatest conspiracies of all time

By Jonathan Vankin

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The 70 Greatest Conspiracies Of All Time

By J. Vankin, Jonathan Vankin

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Un Men

By John Whalen, Whalen John

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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.