Patrick J. Ryan Books

Euclidean And Non-Euclidean Geometry: An Analytic Approach

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This book gives a rigorous treatment of the fundamentals of plane geometry: Euclidean, spherical, elliptical and hyperbolic. The primary purpose is to acquaint the reader with the classical results...

Euclidean and Non-Euclidean Geometry: An Analytic Approach

By Patrick J. Ryan

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What Catholics Do Not Believe

By Patrick J. Ryan

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Understanding Organized Crime in Global Perspective

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Understanding Organized Crime in Global Perspective

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Imale Yoruba Participation in the Muslim Tradition

By Patrick J. Ryan

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When I Survey the Wondrous Cross

By Patrick J. Ryan

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The coming of our God

By Ryan Patrick J.

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Bond markets

By Patrick J. Brown

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Imale Yoruba participation in the Muslim tradition

By Ryan Patrick J., Patrick J Ryan

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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.