Johann Christoph Arnold Books

There's hope for childhood. Despite a perfect storm of hostile forces that are robbing children of a healthy childhood, courageous parents and teachers who know what's best for children are turning...

Su nombre es hoy

By Johann Christoph Arnold

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Sex God marriage

By Johann Christoph Arnold

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In this groundbreaking book, Arnold, a pastor for over forty years, provides fresh biblical insights into critical issues including the sacredness of sex, the struggle against temptation, the decis...

Plough Quarterly No. 5

By Ethan Hughes, Jeannette Rankin, Dorothy Day, Dietrich Bonhoeffer, Tom Cornell, Staughton Lynd, Thomas Merton, Jonathan Wilson Hartgrove, Cat Carter Cat Carter, R. R. Reno, Peace Pilgrim, Johann Christoph Arnold

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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.