J. Michael Lennon Books

Critical essays on Norman Mailer

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Conversations with Norman Mailer

By Norman Mailer

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Conversations with Norman Mailer

By Norman Mailer

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Norman Mailer

By Michael Lennon

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An authorized biography of the provocative chronicler of the second half of the twentieth century that reflects Mailer's dual identities: journalist and activist, devoted family man and notorious p...

Norman Mailer

By J. Michael Lennon

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Norman Mailer

By Michael Lennon

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Norman Mailer

By J. Michael Lennon

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Norman Mailer. JFK. Superman kommt in den Supermarkt

By J. Michael Lennon

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Selected Letters of Norman Mailer

By Norman Mailer

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A genuine literary event—an illuminating collection of correspondence from one of the most acclaimed American writers of all time  Over the course of a nearly sixty-year career, Norman M...

Norman Mailer

By J. Michael Lennon

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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.