David Poyer Books

After a tragic accident maims her laboratory assistant, Dr. Sara Pollard's career as a primate behaviorist lies in ruins. With nothing left to lose, Pollard, descendant of a Nantucket captain whose...

The cruiser

By David Poyer

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"Newly-promoted to captain, Dan Lenson's first glimpse of his command is of a ship literally high and dry. The USS Savo Island, which carries a classified, never-before-deployed missile defense sys...

Hunter killer

By David Poyer

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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.