Edward Packard Books

America: Why Is There an Eye on a Pyramid on the One Dollar Bill

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As an Earth Inspector charged with solving the riddle of why there is an eye on a pyramid on the back of the one dollar bill, the reader travels from New York to Hawaii and encounters federal agent...

Olympus: What Is the Secret of the Oracle

By Edward Packard

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Africa: Where Do Elephants Live Underground?

By Barbara Carter, Edward Packard

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As an Earth Inspector, the reader tries to find the strange place where elephants live underground.

Russia: What Is the Golden Horde?

By Edward Packard

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ESP McGee

By Edward Packard

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When Matt Terrell, new to the neighborhood, makes friends with ESP McGee, a supposed genius with extrasensory perception, they become involved with terrorists interested in sabotaging a nuclear plant.

Deadwood City

By Edward Packard

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By following the instructions at the bottom of each page, the reader can have several different adventures in the Old West.

Deadwood City

By Edward Packard

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By following the instructions at the bottom of each page, the reader can have several different adventures in the Old West.

The third planet from Altair

By Edward Packard

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The reader, en route to the third planet from Altair to seek the source and meaning of extraterrestrial messages, is given choices to make determining the course of the spaceship and the survival o...

The third planet from Altair

By Edward Packard

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Imagining the universe

By Edward Packard

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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.