Simpson John A. Books

S.A. Cunningham & the Confederate heritage

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This is the first full-length biography of Sumner Archibald Cunningham (1843-1913), a central figure of the Lost Cause movement in the post-Civil War South. The focus of John A. Simpson's study is...

Property inspection

By Simpson John A.

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Valuation of marinas

By Simpson John A.

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Edith D. Pope and her Nashville friends

By Simpson John A.

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"Founded in 1893, the Confederate Veteran was a monthly magazine devoted to the wartime reminiscences of Confederate soldiers. In 1913 founding editor Sumner A. Cunningham died, and his longtime se...

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.