Aaron E. Klein Books

The electron microscope: A tool of discovery

By Aaron E. Klein

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Traces the development of the electron microscope, how it works, and the major discoveries that have been made with it.

Beyond time and matter

By Aaron E. Klein

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Discusses the superstitions and scientific facts concerning various aspects of extrasensory perception and other psychic phenomena.

Beyond Time and Matter

By Aaron E. Klein

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Science and the Supernatural: A Scientific Overview of the Occult

By Aaron E. Klein

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Discusses psychological, biological, anthropological, and historical reasons for beliefs in supernatural phenomena.

Science and the supernatural

By Aaron E. Klein

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Discusses psychological, biological, anthropological, and historical reasons for beliefs in supernatural phenomena.

Mind Trips: The Story of Consciousness-Raising Movements

By Aaron E. Klein

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Discusses the background of the consciousness revolution, the many philosophies connected with it, including TM, est, and hari krishna, and its effect on the American way of life.

Mind trips

By Aaron E. Klein

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Discusses the background of the consciousness revolution, the many philosophies connected with it, including TM, est, and hari krishna, and its effect on the American way of life.

The complete beginner's guide to microscopes and telescopes

By Aaron E. Klein, Aaron E Klein

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Discusses the development of microscopes and telescopes, how they work, and how to select and use them.

The complete beginner's guide to microscopes and telescopes

By Aaron E. Klein

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Discusses the development of microscopes and telescopes, how they work, and how to select and use them.

Medical tests & you

By Aaron E Klein

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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.