Charlie Samuels Books

Machines and weaponry of the Vietnam war

By Charlie Samuels

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Explores the weaponry and tactical maneuvers used during the Vietnam War.

Technology in Ancient China

By Charlie Samuels

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The ingenuity of China has been evident in their technology for thousands of years. People in ancient China are responsible for many significant breakthroughs, including gunpowder, paper, and the c...

Technology in Ancient China

By Charlie Samuels

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Technology in Ancient Egypt

By Charlie Samuels

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Technology in Ancient Rome

By Charlie Samuels

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Technology in Mesopotamia

By Charlie Samuels

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Find out how the ancient Mesopotamians lived and worked.

Technology in Mesopotamia

By Charlie Samuels

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Find out how the ancient Mesopotamians lived and worked.

The Tet Offensive

By Charlie Samuels

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The Tet Offensive of 1968 was the turning point of the Vietnam War. It convinced many Americans that the war could not be won. In this book, readers will learn about the different factions of the w...

The Tet Offensive

By Charlie Samuels

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What happened to Pompeii

By Charlie Samuels

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Much of ancient Pompeii remained intact when the city was rediscovered, preserved by the volcanic ash of Mount Vesuvius. This preservation presented artifacts that serve as clues for archaeologists...

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.