Frank Hoffmann Books

As straight and gay people alike live in a time of reluctant commitments, a period of playtime, and the Age of AIDS, the time has come to chronicle the role of mass communication in our search for...

The Christmas carol reader

By William E. Studwell

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Popular American Recording Pioneers

By Frank Hoffmann, Tim Gracyk

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"Popular American Recording Pioneers: 1895-1925 compiles rare information that was scattered in hundreds of record catalogs, hobbyist magazines, newspaper clippings, and phonograph trade journals....

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.