Robert F. Marx Books

Diving for adventure

By Robert F. Marx

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Buried treasure of the United States: How and where to locate hidden wealth

By Robert F Marx

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The underwater dig

By Robert F. Marx

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An introduction to underwater archaeology for the amateur, including the history, principles, techniques, importance, and future of this field.

The voyage of the Nina II

By Robert F. Marx

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Following Columbus

By Robert F. Marx

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The author recounts the building of a replica of the "Nina," the smallest of Columbus's three ships, and the re-enactment of the admiral's first voyage across the uncharted Atlantic Ocean in 1492.

Into the deep

By Robert F. Marx

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Spanish treasure in Florida waters

By Robert F. Marx

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Robert Marx

By Robert F. Marx

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Buried treasures you can find

By Robert F. Marx

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New world shipwrecks, 1492-1825

By Robert F. Marx

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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.