Robert Frager Books

The Wisdom of Islam

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This introductory guide has been written especially for the enlightenment of Western non-Muslims by a Western convert to the Sufi order of Islam. Author Robert Frager asserts that, although many bo...

Essential Sufism

By Robert Frager

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Sharing Sacred Stories

By Robert Frager

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Heart Self Soul

By Robert Frager

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Who am I?

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The Wisdom of Islam

By Robert Frager

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Who am I?

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Asktir Asil Sarap

By Robert Frager

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Kalp Nefs ve Ruh

By Robert Frager

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Quien Soy Yo

By Robert Frager

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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.