Nick Mamatas Books

Insults Every Man Should Know

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A pocket-sized gift book guide to the best hard-hitting insults for every occasion.   This handy little book is packed with insulting gestures, backhanded compliments, comebacks, all the thing...

Quotes Every Man Should Know

By Nick Mamatas

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This pocket-size gift book is a thinking man's arsenal of quotes, quips, and comebacks filled with wit, insight, and genius.   Perfect for the guy who knows everything and wants the words to m...

Shades of Blue and Gray Ghosts of the Civil War

By Nick Mamatas, Laird Barron, Albert E. Cowdrey, Steve Berman

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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.