Dirk Schulze Makuch Books

Voids of eternity

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Nearly 100 years after the Apollo moon landings, the crew of the Deep Explorer experiences mankind's first encounter with an intelligent alien life form intent on obliterating all life on Earth and...

Cosmic Biology

By Dirk Schulze Makuch, Louis Neal Irwin

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We are not alone

By Dirk Schulze Makuch

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"We Are Not Alone boldly argues that extraterrestrial life is astrobiological fact. Far from existing light-years away in the outer reaches of space, it's on our very doorstep. For persuasive evide...

We Are Not Alone

By Dirk Schulze Makuch, David Darling

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The cosmic zoo

By Dirk Schulze Makuch

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Alien Encounter

By Dirk Schulze Makuch

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Life in the Universe

By Dirk Schulze Makuch, Louis N. Irwin

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Life in the universe

By Dirk Schulze Makuch

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Life in the universe

By Dirk Schulze Makuch

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Life in the universe

By Dirk Schulze Makuch

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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.