Carl Schalk Books

The pastor and the church musician

By Carl Schalk

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Luther on Music: Paradigms of Praise

By Carl Schalk

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Source documents in American Lutheran hymnody

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The Music of Early Lutheranism

By Carl Schalk

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Thine the Amen

By Carlos Messerli

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THE ESSAYS: The essays in this book, by distinguished musicologists, teachers, and church musicians, reflect the Lutheran musical heritage of the church and contribute new insights into the vibrant...

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.