William Gilkerson Books

Pirate's Passage

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"A thrillingly exhilarating adventure and glorious coming-of-age story, rich in both imagination and history, in perception and truth.  I couldn't put the book down."—Donald Sutherland...

From rocks to rockets

By William Gilkerson

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A brief overview of arms and armies through the ages, with laughs on every page... but also wry observations that make you think.

Viaje Definitivo

By Willian Gilkerson

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Brotherhood of Pirates

By William Gilkerson

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Brotherhood of Pirates

By William Gilkerson

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Sailing Alone around the World

By Joshua Slocum, William Gilkerson

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Pirate s Passage

By William Gilkerson

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From Rocks To Rockets A Humorous History Of Warfare

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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.