Thomas O Keefe Books

The signs of the times.

By Thomas O Keefe

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Waiting to derail

By Thomas O Keefe

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"Packed with behind-the-scenes road stories, and, yes, tales of rock star debauchery, Waiting to Derail provides a firsthand glimpse into Ryan Adams at the most meaningful and mythical stage of his...

Waiting to Derail

By Thomas O Keefe

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Mystery of the Earth

By Douglas E. Miller, Thomas O Keefe, Peter Selg, Charles Gunn, Marguerite V. Miller

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Threshold of the Spiritual World

By Thomas O Keefe, Rudolf Steiner

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Theosophy

By Henry B. Monges, Clifford Venho, Thomas O Keefe, Rudolf Steiner, David Ecklund

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Path to Self Knowledge

By Julia Selg, Thomas O Keefe, Rudolf Steiner

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Knowledge of the Higher Worlds

By Clifford Venho, Julia Selg, Thomas O Keefe, Rudolf Steiner

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Knowledge of the Higher Worlds

By Clifford Venho, Julia Selg, Thomas O Keefe, Rudolf Steiner

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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.