Jack C. Harris Books

Conan

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An adventure from Conan's teenage years, in which he falls into a hidden chamber beneath the earth and battles an ancient stone creature with supernatural powers.

Super Mario Brothers

By Jack C. Harris

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Molblin's Magic Spear Look Look Book

By Jack C. Harris

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Batman The Case of the Sticky Fingers A Golden Look Look Book

By Al Bigley, Jack C. Harris

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Only Batman can prevent The Joker from stealing the world's largest ruby.

Dwight Eisenhower

By Jack C. Harris

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New Champions of Eternia

By Jack C. Harris

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GoBots

By Jack C. Harris

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When the Guardian GoBots construct a secret base on a distant asteroid, the Renegade GoBots scheme to destroy it.

The Frozen Fiends Defenders Defenders of the Earth

By Jack C. Harris, Golden Books

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Happy Halloween Snoopy Snoopy and Friends

By Charles M. Schulz, Jack C. Harris

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Secret of the dragon's egg

By Jack C. Harris

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He-Man's plan of locating a dragon's egg and raising the baby to fight evil is thwarted when Skeletor steals the egg.

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.