Don L. Hofsommer Books

Steel Trails of Hawkeyeland: Iowa's Railroad Experience

By Don L. Hofsommer

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The Great Northern Railway

By Muriel E. Hidy, Roy V. Scott, Ralph W. Hidy, Don L. Hofsommer

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"The first part of the book (1856-1916) examines the railway's early strategies and philosophy, relations with employees, and vigorous campaigns to develop the service area. The second part (1916-1...

The hook & eye

By Donovan L. Hofsommer

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Minneapolis and the age of railways

By Donovan L. Hofsommer

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Minneapolis and the age of railways

By Donovan L. Hofsommer

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The Tootin Louie

By Donovan L. Hofsommer, Don L. Hofsommer

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The Tootin Louie

By Don L. Hofsommer

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Grand Trunk Corporation

By Donovan L. Hofsommer

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The Detroit, Michigan-based Grand Trunk Corporation was established more than two decades ago by Canadian National to oversee and maximize the potential of its railroad holdings in the United State...

The Southern Pacific, 1901-1985

By Donovan L. Hofsommer

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The Quanah route

By Donovan L. Hofsommer

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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.