Ralph Metzner Books

Green Psychology

By Ralph Ph.D. Metzner, Ralph Metzner

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Psychedelic Experience

By Leary Timothy Metzner Ralph Alpert Richard

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Teonanacatl

By Ralph Metzner

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The well of remembrance

By Ralph Metzner

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The Well of Remembrance

By Ralph Metzner

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In his introduction to The Well of Remembrance, author Ralph Metzner provides a telling explanation of the theme of his work: "This book explores some of the mythic roots of the Western worldvie...

Know Your Type

By Ralph Metzner

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The unfolding self

By Ralph Metzner

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The expansion of consciousness

By Ralph Metzner

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The roots of war and domination

By Ralph Metzner

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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.