Warren Smith Books

Practical Optical System Layout: And Use of Stock Lenses

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The "first cut" design of an optical system - anything from a telescope to a complicated VR helmet - is usually not done by a specialist but by a more general optical engineer. This book, drawn fro...

Modern Lens Design

By Warren J. Smith

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Modern Optical Engineering, 4th Ed.

By Warren J. Smith

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Strange Hexes

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John Wesley and slavery

By Warren Thomas Smith

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This hollow earth

By Warren Smith

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Go Ski

By Warren Smith

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Tibetan Nation

By Warren W. Smith

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Light That Was Dark

By Warren Smith

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Shakespeare s Playhouse Practice

By Smith Warren Dale, Warren D. Smith, Smith Warren D.

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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.