Randall S. Peffer Books

Where Divers Dare

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In the tradition of Shadow Divers, this is the gripping true account of the search for German U-boat U-550, the last unfound, diveable wreck of a U-boat off the United States coast, and the battle...

New York and Pennsylvania and New Jersey

By Randall S. Peffer

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National Geographic Driving Guide to America New York

By National Geographic Society

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Watermen

By Randall S. Peffer

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Lonely Planet Puerto Rico

By Randall S. Peffer, Randall Peffer

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Lonely Planet Virgin Islands

By Randall Peffer

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Seahawk burning

By Randall S. Peffer

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Seahawk Burning

By Randall Peffer

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Seahawk burning

By Randall S. Peffer

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Logs of the Dead Pirates Society

By Randall S. Peffer

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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.