Randolph Delehanty Books

San Francisco

By Randolph Delehanty

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The first rock & rollconfidential report

By Dave Marsh

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New Orleans, elegance and decadence

By Richard Sexton

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Art in the American South

By Randolph Delehanty

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Roger Houston Ogden, an attorney and entrepreneur in New Orleans, has over the past quarter century assembled one of the finest collections of southern American art in the world. The Ogden Collecti...

In the Victorian Style

By Randolph Delehanty

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In the Victorian Style

By Randolph Delehanty

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San Francisco

By Randolph Delehanty, Randy Delehanty

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San Francisco Victorians

By Randolph Delehanty, Michael Blumensaadt

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New Orleans

By Richard Sexton, Randolph Delehanty

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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.