Fethullah Gulen Books

Key Concepts in the Practice of Sufism

By Fethullah Gulen

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Islam and Violence

By Fethullah Gulen

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Jihad vs. Violence

By Fethullah Gulen

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Al Qulub al dari ah

By Fethullah Gulen

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Reflections on the Qur'an

By Fethullah Gulen

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The Qur'an is believed by Muslims to be the final word of God revealed to humanity through Prophet Muhammad speaking to all humans for all times. This nature of Islam s holy book brings along a con...

Reflections on the Qur an

By Fethullah Gulen

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Key Concepts in the Practice of Sufism 1

By Fethullah Gulen

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Key concepts in the practice of Sufism

By Fethullah Gulen

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Questions and Answers About Islam Vol. 2

By Fethullah Gulen

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Preguntas y respuestas sobre la fe islamica vol. 1

By Fethullah Gulen

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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.