David Lefer Books

They Made America: From the Steam Engine to the Search Engine: Two Centuries of Innovators

By Gail Buckland, David Lefer, Harold Evans

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They Made America: From the Steam Engine to the Search Engine: Two Centuries of Innovators

By Evans Harold, Harold Evans

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"The flourishing of America is the story of an inventive people with a mystic faith in technology, from the early settlers who used windmills as a way of getting water on the Great Plains to the el...

They Made America Two Centuries of Innovators from the Steam Engine to the Internet Revolution

By David Lefer, Harold Evans

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They Made America

By Harold Evans

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The founding conservatives

By David Lefer

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An analysis of the lesser-known contributions of pragmatic conservatives who worked diligently throughout the American Revolution to combat radicalism and establish key economic foundations also of...

Founding Conservatives

By David Lefer

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The Founding Conservatives

By David Lefer

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“It is not only the cause, but our manner of conducting it, that will establish character.”—John Dickinson, 1773 A nation at war and widespread mistrust of the military...

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.