Thomas P. Ostrom Books

"The United States Coast Guard served a variety of vital functions in World War II, providing service that has been too little recognized in histories of the war. This history details those and oth...

United States Coast Guard in World War II

By Thomas P. Ostrom

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The United States Coast Guard and national defense

By Thomas P. Ostrom

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"This chronicle of the Coast Guard's contributions to national defense examines participation in World War I, World War II, Korea, the Cold War, Vietnam, and the War on Terror. Among the topics exp...

United States Coast Guard Leaders and Missions 1790 to the Present

By Thomas P. Ostrom, John J. Galluzzo

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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.