Lenny Flank Books

Turtle

By Lenny Jr. Flank, Lenny Flank

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The Turtle

By Lenny Jr. Flank, Lenny Flank

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The Tarantula

By Lenny Flank Jr.

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A critique of authoritarian Leninism from the viewpoint of "council communism". Social revolutionaries must reject the failed leninist model as being unsuited to the social conditions existing in t...

Contradictions of Capitalism

By Lenny Flank

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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.