Bart Hopkin Books

An encyclopedic, large-format book containing hundreds of illustrations, Musical Instrument Design provides all the information that anyone (amateur or professional) should ever need to construct a...

Getting a Bigger Sound

By Bart Hopkin

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The book describes how to amplify acoustical musical instruments. Also included are the descriptions of different types of microphones and pickups, discussions of the placement of equipment, and do...

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.