Gerald Astor Books

Presidents at War

By Gerald Astor, John P Murtha

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Right to Fight: A History of African Americans in the Military

By Gerald Astor

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In the skies of World War II Europe, the Eighth Air Force was a defining factor in turning the tide against the Nazis. In these gripping oral histories, the sacrifice, savagery, and supremacy of th...

A Blood-Dimmed Tide

By Gerald Astor

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Drawing on firsthand accounts by survivors of the bloody Battle of the Bulge, diaries, letters, and official documents, this study describes the events of the campaign, hardships faced by the soldi...

Operation Iceberg

By Gerald Astor

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Gerald Astor, author of The Mighty Eighth, draws on the raw, first-hand accounts of marines, sailors, soldiers, and airmen under fire to recount the dramatic and gripping story of the last major ba...

Terrible Terry Allen

By Gerald Astor

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Terry de la Mesa Allen’s mother was the daughter of a Spanish officer, and his father was a career U.S. Army officer. Despite this impressive martial heritage, success in the military seemed...

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.