Gary L. Blackwood Books

Life in a medieval castle

By Gary L. Blackwood

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Describes the history, purpose, and construction of medieval castles and the life of their various inhabitants.

Bucket's list

By Gary L. Blackwood

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Introducing private investigator Charley Field, the true-life inspiration behind Charles Dickens' Inspector Bucket, in an intriguing new Victorian mystery series. December, 1853. Having found fame...

Wild Timothy

By Gary L. Blackwood

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Thirteen-year-old Timothy, more interested in reading than in physical activity, reluctantly accompanies his enthusiastic father on a camping trip and, when he accidentally becomes lost in the wood...

Wild Timothy

By Gary L. Blackwood

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Shakespeare s scribe

By Gary L. Blackwood

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In plague-ridden 1602 England, a fifteen-year-old orphan boy, who has become an apprentice actor, goes on the road with Shakespeare's troupe, and finds out more about his parents along the way.

Around the world in 100 days

By Gary L. Blackwood

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When seventeen-year-old Harry Fogg undertakes a race against time to win a wager with a member of his famous father's club, he puts to good use the recklessness and fascination with all things mech...

Mysterious messages

By Gary L. Blackwood

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Shakespeare s Spy Shakespeare Stealer

By Gary L. Blackwood

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Debatable deaths

By Gary L. Blackwood

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

Enigmatic events

By Gary L. Blackwood

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

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.