Fred Valdez Books

Heterarchy Political Economy and the Ancient Maya

By Ill. Society For American Archaeology Meeting 1999 Chicago

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"The ancient Maya of the southern Yucatan peninsula remain a mystery to many scholars attempting to explain early complex societies. Their dispersed settlement patterns and land-use techniques sugg...

Horseman That Fell from the Sky

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Ancient Maya Commoners

By Jon C. Lohse, Fred Valdez

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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.