Michael A. Ryan Books

End of days

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"The idea of the annihilation of life is a culturally universal concept. The first half of the book invites readers to explore ancient, medieval, early modern, and modern popular conceptions of the...

End of Days

By Karolyn Kinane, Michael A. Ryan

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Kingdom of Stargazers

By Michael A. Ryan

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A kingdom of stargazers

By Michael A. Ryan

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Kingdom of Stargazers

By Michael A. Ryan

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A companion to the premodern Apocalypse

By Michael A. Ryan

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A companion to the premodern Apocalypse

By Michael A. 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.