Charles Campisi Books

Blue on blue

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From 1996 through 2014 Charles Campisi headed NYPD's Internal Affairs Bureau, working under four police commissioners and gaining a reputation as hard-nosed and incorruptible. When he retired, only...

Blue on Blue

By Charles Campisi

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Blue on Blue

By Charles Campisi, Gordon L. Dillow

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Policing the Big Apple

By Jules Stewart, Charles Campisi

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Policing the Big Apple

By Jules Stewart, Charles Campisi

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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.