Robbie Castleman Books

Know God as David Knew Him David--impetuous, sensitive, bold, poetic, compassionate, utterly human. What can we learn from this young warrior-king of long ago? And how could God call David a "man a...

King David

By Robbie Castleman

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Fisherman Bible Studyguides have been a trusted name in Bible study for almost thirty years. With outstanding authors, an emphasis on personal growth, and over eighty titles, the Fisherman guides o...

Elijah

By Robbie Castleman

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You Don't Have to Be Perfect to Serve God. It isn't always easy to serve our God in a culture that is alternately ambivalent and hostile toward him, especially when we ourselves are so flawed. We'r...

Miracles Bible Study Guides

By Robbie Castleman

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Peter

By Robbie Castleman

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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.