William Jay Jacobs Books

Robert Cavelier de La Salle

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A brief biography of the seventeenth-century French explorer who traveled the entire length of the Mississippi and took possession of all its surrounding territory for France.

World War II First Books

By William Jay Jacobs, Susan Sinnott, Robert Daily

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Cortes, Conqueror of Mexico

By Williams Jay Jacobs

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Pizarro, conqueror of Peru

By William Jay Jacobs

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Champlain

By William Jay Jacobs

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Magellan

By William Jay Jacobs

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Coronado

By William Jay Jacobs

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LA Salle

By William Jay Jacobs

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First Book: Dwight David Eisenhower

By William Jay Jacobs

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War with Mexico

By William Jay Jacobs

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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.