Maria Victoria Alvarez Books

The Penguin Spanish Phrase Book

By Maria Alvarez, Jill Norman, Maria Victoria Alvarez

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Spanish phrase book

By Jillian Norman, Jill Norman

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Spanish Phrase Book Penguin Popular Reference

By Jill Norman, M.V. Alvarez

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The Penguin Spanish Phrasebook

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A stylish, pocket-size phrasebook perfect for business travelers, backpackers, sightseers, and anyone who wants to keep their Spanish close at hand Penguin’s Spanish phrasebook includes a wealth of...

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.