Robert J. Karris Books

"Complete biblical texts with sound, scholarly based commentary that is written at a pastoral level; the Scripture translation is that of the New American Bible with Revised New Testament and revis...

Eating your way through Luke s Gospel

By Robert J. Karris

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"Considers the theme of food in Luke's Gospel; links issues of food in Luke with contemporary issues in church and society, as well as with contemporary sociological, cultural, and philosophical an...

Collegeville Bible Commentary New Testament Set 11 Volumes

By Robert J. Karris

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The Collegeville Bible Commentary Based on the New American Bible

By Robert J. Karris

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Jesus and the marginalized in John's Gospel

By Robert J. Karris

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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.