Bernard Rostker Books

The Defense Officer Personnel Management Act of 1980

By James Lacy, Harry Thie, Bernard Rostker

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I Want You

By Bernard Rostker

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America Goes to War

By Bernard Rostker

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Recruitment and Retention

By Rostker D. Bernard, Bernard Rostker

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Since Hurricane Katrina, resignations from the New Orleans Police Department (NOPD) have increased, and the department went more than a year without recruiting enough candidates to justify a police...

I Want You

By Bernard Rostker

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Providing for the casualities of war

By Bernard Rostker

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War has always been a dangerous business, bringing injury, wounds, and death, and--until recently--often disease. What has changed over time, most dramatically in the last 150 or so years, is the c...

Providing for the casualities of war

By Bernard Rostker

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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.