Jonathan Leeman Books

"The gospel consists merely of words, but those words have the unexpected and underestimated power to create new life, to justify, to prepare a bride, to give the foretaste of glory. Contributing a...

Understanding Church Leadership

By Mark Dever, Jonathan Leeman

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Unashamed of the Gospel

By Mark Dever, John MacArthur, Jonathan Leeman, Kevin DeYoung, Matt Chandler, John Piper, David Platt, Ligon Duncan, Albert Mohler, Thabiti Anyabwile

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The Church Praying 9Marks Journal

By Zach Schlegel, Jonathan Leeman, Megan Hill, John Onwuchekwa, Greg Spraul, Erin Wheeler, Carrie Russell, Phil Ryken, Ryan Fullerton, David Helm

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Missions 9Marks Journal

By Tim Keesee, Matt Mason, Ken Caruthers, Andy Johnson, Jonathan Leeman, Ryan King, Steve Jennings, Mark Collins, Zane Pratt, Ken Mbugua

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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.