Frank Warren Books

PostSecret: Extraordinary Confessions From Ordinary Lives

By Frank Warren, Frank Warren, Frank Warren

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New York Times Bestseller The project that captured a nation's imagination. The instructions were simple, but the results were extraordinary. You are invited to anonymously contribute a secret to a...

My Secret: A PostSecret Book

By Unknown, Frank Warren

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Postsecret.com founder Frank Warren is back with a fresh and compelling companion to his wildly popular Los Angeles Times bestseller, PostSecret. For My Secret, a collectible, paper-over-board book...

The Secret Lives of Men and Women: A PostSecret Book

By Frank Warren

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Liberals and communism

By Frank A. Warren

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Liberals and Communism: The Red Decade Revisted

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Deck And Field

By Hackett Frank Warren

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Hitting Back

By I Stafford, Frank Warren

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Addington

By Frank Warren

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Music in Portsmouth 1789-1842

By Frank Warren

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Muster Rolls of the Participating Companies of American Militia and Minute Men in The Battle of April 19 1775

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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.