Mark D. Johnston Books

The Evangelical Rhetoric of Ramon Llull: Lay Learning and Piety in the Christian West Around 1300

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Ramon Llull (1232-1316), born on Majorca, was one of the most remarkable lay intellectuals of the thirteenth century. He devoted much of his life to promoting missions among unbelievers, the reform...

The Spiritual Logic of Ramon Llull

By Mark D. Johnston

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Ramon Llull

By Ramon Llull, Mark D. Johnston

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Ramon Llull

By Mark D. Johnston

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Evangelical Rhetoric of Ramon Llull

By Mark D. Johnston

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Ramon Llull s New Rhetoric

By Mark D. Johnston

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Ramon Llull s New Rhetoric

By Mark D. Johnston

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Ramon Llull s New Rhetoric

By Mark D. Johnston

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Ramon Llull s New Rhetoric

By Mark D. Johnston

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Evangelical Rhetoric of Ramon Llull

By Mark D. Johnston

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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.