David Groff Books

Where Is Stonehenge

By John Hinderliter, David Groff, True Kelley

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A Common Good: The Friendship Of Robert F. Kennedy And Kenneth P. O'donnell

By David Groff, Helen O Donnell

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Kenny O'Donnell was an integral part of Camelot, from the time he and Robert Kennedy first met at Harvard in 1947 to the dream's violent end with Bobby's untimely death in 1968. Together, they were...

Who s yer daddy

By Jim Elledge, David Groff

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"Who's Yer Daddy? offers readers of gay male literature a keen and engaging journey. In this anthology, thirty-nine gay authors discuss individuals who have influenced them-- their inspirational "d...

Who's yer daddy?

By Jim Elledge, David Groff

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Where Is Alcatraz

By David Groff, Nico Medina, Who HQ

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What Was the Alamo

By Meg Belviso, David Groff, Pam Pollack

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Who Was Alexander Graham Bell

By Bonnie Bader, David Groff

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Quien Fue La Madre Teresa

By Jim Gigliotti, David Groff

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Out Facts

By David Groff

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Clay

By David Groff

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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.