Leland Gregory Books

Great Government Goofs: Over 350 Loopy Laws, Hilarious Screw-Ups and Acts-Idents of Congress

By Leland Gregory

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Presumed Ignorant!: Over 400 Cases of Legal Looniness, Daffy Defendants, and Bloopers from the Bench

By Leland Gregory

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Presidential Indiscretions

By Leland Gregory

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Over 250 outrageous acts, scandalous shenanigans, and risqué romps in the Oval Office! One president and one vice president died with their mistresses at their side. 32nd president Franklin Rooseve...

Presumed Ignorant

By Leland Gregory

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Hey Idiot Chronicles of Human Stupidity

By Leland Gregory

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What s The Number For 911

By Leland Gregory, Leland H. Gregory III

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The stupid crook book

By Leland Gregory

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All the crimes are true, but names have been altered or eliminated.

Hey idiot!

By Leland Gregory

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Bush Whacked

By Leland Gregory

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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.