Jeffrey Kacirk Books

The Word Museum: The Most Remarkable English Words Ever Forgotten

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"As the largest and most dynamic collection of words ever assembled, the English language continues to expand. But as hundreds of new words are added annually, older ones are sacrificed. Now from t...

Forgotten English: A Merry Guide to Antiquated Words, Packed with History, Fun Facts, Literary Excerpts, and Charming Drawings

By Jeffrey Kacirk

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Forgotten English

By Jeffrey Kacirk

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Informal English

By Jeffrey Kacirk

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The Word Museum The Most Remarkable English Words Ever Forgotten

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Forgotten English Volume I Knowledge Cards

By Jeffrey Kacirk

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Intoxicants Potions

By Jeffrey Kacirk

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Altered English

By Jeffrey Kacirk

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Kacirk s Forgotten English 2005 Calendar

By Jeffrey Kacirk

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Jeffrey Kacirks Forgotten English

By Jeffrey Kacirk

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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.