David Lewman Books

A Rugrats Night Before Christmas

By David Lewman

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Case of the missing gold

By David Lewman

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Tommy and his friends are off on a time travel adventure back to the California Gold Rush era, and trouble soon appears when the babies encounter a rattlesnake and a prospecting thief.

The Wild Thornberrys joke book

By David Lewman

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The Wild Thornberrys Joke Book

By David Lewman

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SpongeBob SquarePants Joke Book

By David Lewman

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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.