John Haase Books

Big Red
Big Red

By John Haase

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Big Red
Big Red

By John Haase

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San Francisco
San Francisco

By John Haase

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Forty-nine square miles of intoxicating beauty nestled between the rugged California coastline and the glorious Golden Gate. A breathtaking panorama of lush green hills, crystalline waters, and daz...

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The Nuptials
The Nuptials

By John Haase

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Seasons And Moments
Seasons And Moments

By John Haase

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Space Suites & Gumshoes -An Anthology Of Science Fiction And Crime Stories
One Person Can Make A Difference!
Big Red
Big Red

By John Haase

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Petulia
Petulia

By John Haase

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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.

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