William Penberthy Books

Exam Ref 70-486: Developing ASP.NET MVC 4 Web Applications

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Prepare for Microsoft Exam 70-486—and help demonstrate your real-world mastery of developing ASP.NET MVC-based solutions. Designed for experienced developers ready to advance their status, Exam Ref...

Beginning ASP.NET for Visual Studio 2015

By William Penberthy

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Beginning ASP. NET for Visual Studio 2015

By William Penberthy

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Beginning ASP. NET for Visual Studio 2015

By William Penberthy

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Pro . NET on Amazon Web Services

By William Penberthy, Steven Roberts

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Exam Ref 70 486 Developing ASP. NET MVC 4 Web Applications with Practice Test Access

By William Penberthy

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Exam Ref 70-486 : Developing ASP.NET MVC 4 Web Applications

By William Sanders, William Penberthy

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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.