Walter Buehr Books

Knights Castles and Feudal Life

By W. Buehr

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Spanish Conquistadors in North America

By W. Buehr

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The First Book of Measurement

By Walter Buehr, Beryl Epstein, Sam Epstein

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Firearms

By Walter Buehr, Buehr W

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A history of modern weapons and their influence on military tactics, social life, and political institutions. Illustrates each weapon and describes its invention, construction and decisive use.

When towns had walls

By Walter Buehr

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Pictures and text recreate the daily life of an imaginary medieval village in England.

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.