Thomas Michael Books

An illustrated price guide to coins minted in the United States, Canada, and Mexico since the colonial era, with listings in up to eleven different grades of condition and pricing based on the prec...

Standard catalog of world coins 1801 1900

By George S. Cuhaj, Freeman Craig

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2013 North American Coins Prices CD

By Thomas Michael, Harry S. Miller

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Collecting world coins

By George S. Cuhaj

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Over a century of circulating coins! From Afghanistan to Zimbabwe, Collecting World Coins, 1901-Present, offers the most comprehensive country-by-country, fully illustrated listing of 20th and earl...

2015 standard catalog of world coins 2001 to date

By Harry Miller, George S. Cuhaj, Thomas Michael

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Includes current market valuations, universally accepted KM identification numbers, detailed descriptions and updated mintages, thousands of new listings, numeric grades for all types, and the addi...

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.