Mark L. Armour Books

This is a collection of more than 170 photos and two dozen essays and which tell the 120-year history of baseball in the Pacific Northwest. The stories range chronologically from the origins of the...

Great Eight

By Society For American Baseball Research, Mark Armour

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Great Eight

By Society For American Baseball Research SABR, Mark Armour

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Great Eight

By Mark L. Armour, Society For American Baseball Research Staff

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Joe Cronin

By Mark L. Armour

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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.