David E. Grogan Books

Sapphire Pavilion

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Steve Stilwell's Former Navy Jag Corps Buddy Ric Stokes Has Been Jailed For Possession Of Heroin In Vietnam. He Was Found In The Same Room With His Traveling Companion Ryan Eversall, Who Died Of An...

The Siegel Dispositions

By David Grogan, David E. Grogan

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The Siegel Dispositions

By David Edward Grogan, David E. Grogan

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Hidden Key

By David Grogan, David E. Grogan

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Sapphire Pavilion

By David E. Grogan

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Sapphire Pavillion

By Grogan, David E. Grogan

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When Ric Stokes, a close friend of ex-Navy JAG Steve Stilwell, is arrested in Vietnam for selling heroin, Steve travels to Saigon to clear his name. He and his new assistant Casey soon find their l...

The Siegel Dispositions

By Grogan, David E. Grogan

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On September 30, 1997, In Düsseldorf, Germany, An Old Jewish Man Named Emil Weisentrope Is Shot Dead. That Same Day In Williamsburg, Virginia, Steve Stilwell Hangs Out His Shingle After Serving 22...

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.