Rob Roy Books

The Navy SEAL Art of War
The Navy SEAL Art of War

By Rob Roy With Chris Lawson

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In a groundbreaking, narrative-driven book for businesses, managers (and those who aspire to the managerial ranks), and entrepreneurs, a veteran Navy SEAL Chief Petty Officer shows how the skills t...

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Complete book of cordwood masonry housebuilding
Complete book of underground houses
Stoneview
Stoneview

By Rob Roy

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Cordwood building
Cordwood building

By Robert L. Roy

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"From various wall-building methods and new mortar options to electrical wiring and code compliance, and augmented by fresh case studies from around the world, more than a dozen new chapters cover...

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Essential Cordwood Building
Essential Cordwood Building

By Rob Roy

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Cordwood Building
Cordwood Building

By Rob Roy

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Timber Framing for the Rest of Us
Earth Sheltered Houses
Earth Sheltered Houses

By Rob Roy

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The sauna
The sauna

By Robert L. Roy

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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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