Paul Mariani Books

Thirty Days

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From the day Paul Mariani arrives at Eastern Point Retreat House to take part in the five-hundred-year-old Spiritual Exercises of St. Ignatius, he realizes that his expectations and assumptions abo...

The great wheel

By Paul L. Mariani

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The Broken Tower: A Life of Hart Crane

By Paul Mariani, Paul L. Mariani

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Few poets have lived as extraordinary and fascinating a life as Hart Crane, the American poet who made his meteoric rise in the late 1920s and then as suddenly flamed out, killing himself at the ag...

Salvage Operations

By Paul Mariani

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Lost Puritan

By Paul L. Mariani

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The Broken Tower

By Paul L. Mariani

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Crossing Cocytus

By Paul Mariani

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Gerard Manley Hopkins

By Wendy Doniger, Paul L. Mariani

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Thirty Days

By Paul Mariani

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A commentary on the complete poems of Gerard Manley Hopkins

By Paul L. Mariani

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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.