Brian Johnson Books

Self Portrait
Self Portrait

By Brian Johnson

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A philosopher s notes
A philosopher s notes

By Brian Johnson

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A philosopher's notes on optimal living, creating an authentically awesome life and other such goodness.

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Option Income Strategy Trade Filters
Option Strategy Hedging Risk Management
Henry Hockeysticks
Henry Hockeysticks

By Brian Johnson, Maha Younus

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Homerun Homerun Baseball Star
Henry and Hailey Hockeysticks
Henry and Hailey Hockeysticks
Deceptions
Deceptions

By Brian Johnson

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Necessary Motive
Necessary Motive

By Brian Johnson

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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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