Robert Shea Books

Illuminatus!

By Robert Shea, Shea

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Illuminatus

By Robert Shea, Robert Anton Wilson

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Illuminatus

By Robert J. Shea, Robert A. Wilson

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The Illuminatus! Trilogy

By Robert Shea, Robert Anton Wilson

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Filled with sex and violence--in and out of time and space--the three books of The Illuminatus are only partly works of the imagination. They tackle all the coverups of our time--from who really sh...

Shike

By Robert Shea

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Shike

By Robert Shea

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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.