Thomas Greanias Books

Raising Atlantis

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"There's more to the story of Atlantis than a lost continent-- there's also a centuries-old global conspiracy. author Thomas Greanias believes that it was the volcanic destruction of Thira-- modern...

The Atlantis prophecy

By Thomas Greanias

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Famed archaeologist Conrad Yeats discovers that the monuments on the National Mall are aligned to the stars and destined to "lock" with the stars on a prearranged date, sending him on a perilous jo...

Raising Atlantis

By Thomas Greanias

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The Atlantis revelation

By Thomas Greanias

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The Promised War: A Thriller

By Thomas Greanias

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The promised war

By Thomas Greanias

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Israeli counter-terrorism agent Sam Deker is abducted by radical adversaries and finds himself seemingly transported through time to the eve of a historical battle in ancient Israel, an event he fe...

The Atlantis legacy

By Thomas Greanias

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The Atlantis Legacy

By Thomas Greanias

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The 34th degree

By Thomas Greanias

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Sam Deker travels back in time to Nazi-occupied Greece to steal a formula for an ultimate weapon only to discover that Hitler's Secret Service is a front for a centuries-old organization that would...

The 34th degree

By Thomas Greanias

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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.