John Marino Books

Frommer s Caribbean 2011

By Darwin Porter

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Puerto Rico Off the Beaten Path

By John Marino

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Puerto Rico Off the Beaten Path 2nd

By John Marino

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How to make big money in real estate

By John Marino

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Frommer s Caribbean

By Christina Colo N

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Presents guidance and tools for visitors to the Caribbean, including trip planning information, lodging and dining suggestions for different budgets, and details on history, culture, and things to...

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.