Richard Doetsch Books

Die Quelle der Seelen

By Richard Doetsch

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Di 13 ge xiao shi

By Richard Doetsch

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13 godzina polish

By Doetsch Richard

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Los ladrones de la fe

By Richard Doetsch

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13. sat

By Richard Doetsch

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The most closely Guarded treasure on Earth.An explosive ancient secret.A breakneck journey into the heart of the Vatican.In a small, heavily fortified room just north of the Sistine Chapel, a maste...

Thieves of Darkness

By Bob Walter, Richard Doetsch

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The thieves of darkness

By Richard Doetsch

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The Thieves of Legend

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Michael and his ex-girlfriend KC Ryan have been blackmailed by a U.S. Army colonel. They are to travel to opposite ends of China, and each is responsible for stealing a piece of an ancient puzzle:...

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.