Ian Douglas Books

Environmental Change and Tropical Geomorphology

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The United Star Marines, who have operated unnoticed for years after the mighty Xul nearly destroyed Earth, journey to the farthest reaches of the galaxy to destroy the tyrants who dominate the uni...

Semper Human: Book Three of the Inheritance Trilogy

By Ian Douglas

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Earth Strike: Star Carrier: Book One

By Ian Douglas

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Center of Gravity: Star Carrier: Book Two

By Ian Douglas

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"On the far side of known human space, the Marines are under siege, battling the relentless servant races of the Sh'daar aggressor. With a task force stripped to the bone and the Terran Confederati...

Deep Space: Star Carrier: Book Four

By Ian Douglas

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"Humanity had appeared to fend off theSh'daar assault once and for all, though they never learned why the alien empire was driven to halt Earth's advancement toward technological Singularity. But i...

Dark Matter: Star Carrier: Book Five

By Ian Douglas

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The United States of North America is now engaged in a civil war with the Earth Confederation, which wants to yield to the demands of the alien Sh'daar, limit human technology, and become a part of...

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.