David Jefferis Books

Super Subs
Super Subs

By David Jefferis

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Dreams of Space
Dreams of Space

By David Jefferis

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The first flyers
The first flyers

By David Jefferis

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The history of man's desire to fly and descriptions of early flights and aircraft.

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Close Encounters: Strange Truth About Unidentified Flying Objects
Jets
Jets

By David Jefferis

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Star Spotters
Star Spotters

By David Jefferis

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Ice Dwarfs
Ice Dwarfs

By David Jefferis

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Sun
Sun

By David Jefferis

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Sun
Sun

By David Jefferis

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Galaxies
Galaxies

By David Jefferis

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Related Articles from our Blog

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.

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