Rainer Koethe Books

Mysteries Of The World

By Peter. Klaucke, Unknown, Rainer, Ph.D. Koethe, Frank Kliemt, Rainer Koethe

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Have UFOs really landed on Earth? Is our future in the stars? Can we contact the dead? These questions and others engage the reader and are seriously investigated and considered in this exciting book.

Volcanoes

By William Connors, Rainer, Ph.D. Koethe, Rainer Köthe, Gerd Ohnesorge, Rainer Koethe

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48 pages : 28 cm "Volcanoes frighten and fascinate us at the same time. Volcanic mountains seem to burst into flames as glowing rocks fly from the depths of earth ... what makes volcanoes erupt? Wh...

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.