David Poyer Books

Overthrow

By Gary Galone, David Poyer

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Wednesdays With Frank

By Lenore Hart, David Poyer, Steve Berry

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"Welcome to the most dangerous sport on earth: where cave divers step into murky Florida ponds and end up hundreds of feet below the ground, threading through the narrow passages of Swiss-cheese-li...

Stepfather Bank

By D. C. Poyer

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Deep War

By David Poyer

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Deep War

By Gary Galone, David Poyer

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Rethinking the Gulag

By Emily D. Johnson, Irina Anatolievna Flige, Aleksandr Etkind, Alan Barenberg, Susan Grunewald

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The crisis

By David Poyer

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Assigned to improve an undisciplined patrol craft squadron in the Red Sea, Naval Commander Dan Lenson and his Tactical Analysis Group find themselves on a humanitarian mission in famine-stricken no...

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.