Joel Vilensky Books

Rohen s Photographic Anatomy Flash Cards

By Johannes W. Rohen

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Encephalitis Lethargica: During and After the Epidemic

By Joel A. Vilensky

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During the 1920s and 1930s a strange, very polymorphic condition affected much of the world although not at the same time everywhere and certainly not with the same symptoms. This condition, enceph...

Encephalitis Lethargica

By Joel Vilensky

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Encephalitis Lethargica

By Joel Vilensky

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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.