Gerald L. Posner Books

The result of two years of meticulous research, and based on hundreds of new interviews and documents, Citizen Perot strips away the mythology and unmasks the real Ross Perot for the first time. T...

Mengele

By Gerald L. Posner

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Case closed

By Gerald L. Posner

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Why America Slept

By Gerald L. Posner

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Examines the terrorist attacks of September 11th and why the disaster was not prevented, discussing how breakdowns in intelligence and political infighting allowed terrorists to carry out an unprec...

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.