Gary L. Blackwood Books

Legends or lies

By Gary L. Blackwood

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"Discusses the mysteries surrounding history's legends"--Provided by publisher.

Perplexing people

By Gary L. Blackwood

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"Discusses the mysteries surrounding history's most perplexing people"--Provided by publisher.

Curiosity

By Gary L. Blackwood

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In 1835, when his father is put in a Philadelphia debtor's prison, twelve-year-old chess prodigy Rufus Goodspeed is relieved to be recruited to secretly operate a chess-playing automaton named The...

Ethan Frome

By Gary L. Blackwood, Edith Wharton

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Mysterious Messages

By Gary L. Blackwood

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The Shakespeare Stealer

By Gary L. Blackwood

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The Shakespeare Stealer

By Gary L. Blackwood

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Shakespeare's Spy

By Gary L. Blackwood, Gary Blackwood

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The winter of 1602 brings many changes for Widge, a young apprentice at London's Globe Theatre, as he becomes infatuated with Shakespeare's daughter Judith, attempts to write a play, learns more ab...

Perplexing people

By Gary L. Blackwood

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"Describes various famous pretenders in history, including those individuals who claimed to be Joan of Arc, Anastasia, the French Dauphin who would have been King Louis XVII, and the outlaw Billy t...

Al Otro Lado De La Puerta the Other Side of the Door

By Gary L. Blackwood

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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.