Warman S Books

Foundations of Coin Collecting

By Warman S

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Lincoln Cents 1909-1958 Collector's Folder

By Warman S

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To do its part in the war effort, the U.S. Mint changed from a copper cent to a zinc-coated steel version for one year, in 1943. Rumor quickly spread that anyone who found a 1943 copper cent would...

Warman s State Quarter Collector s Map

By Warman S

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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.

Warman S Books

Lincoln Cents 1959 2009

Foundations of Coin Collecting

Coins of the 1960s

Coins of The 1970s

Coins of the 1980s

Coins of the 2000s

Jefferson Nickels for Kids

State Quarters for Kids

Lincoln Cents 1909-1958 Collector's Folder

Warman s State Quarter Collector s Map

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

What is an EAN and How Does it Relate to an ISBN?